Not sure if this belongs here but I can't hide the code and give credit to the original source.

When I worked for a company writing education software many moons ago on the BBC micro we had a product that would work out the polynonial function for a sequence of number. We actually used this in some crude protection schemes.

Excel offers a smaller version of this in trending so I thought I could use the principle to generate a JAPH. Limitations in Excel mean accuracy is limited to 6 characters at a time.

I dare say those with a more maths bent can get this even better.

#!/usr/local/bin/perl -w
use strict;
map{ eval}
('map{printf "%c" ,3.55*$_**5-57.583*$_**4+347.75*$_**3-972.92*$_**2+1
+249.2*$_-463.5}(1..6)',
'map{printf "%c", -0.55*$_**5+10.208*$_**4-69.833*$_**3+215.29*$_**2-2
+92.12*$_+247.5}(1..6)',
'map{printf "%c", 1.25*$_**5-25.333*$_**4+191.25*$_**3-672.17*$_**2+10
+99*$_-561.5}(1..6)',
'map{printf "%c", 0.5833*$_**5-9.4583*$_**4+56.167*$_**3-148.54*$_**2+
+169.25*$_+36.5}(1..6)');
print "\n"
[download]

Note I'm not a mathematician so if this is named wrongly and someone else already has this then I appologise.

Update

With some playing I have this down to

for('3.55*$i**5-57.583*$i**4+347.75*$i**3-972.92*$i**2+1249.2*$i-463.5
+','-0.55*$i**5+10.208*$i**4-69.833*$i**3+215.29*$i**2-292.12*$i+247.5
+','1.25*$i**5-25.333*$i**4+191.25*$i**3-672.17*$i**2+1099*$i-561.5','
+0.5833*$i**5-9.4583*$i**4+56.167*$i**3-148.54*$i**2+169.25*$i+36.5'){
+{for$i(1..6){printf"%c",eval$_}}};
[download]

Update 2 This is now at 306 chars.

map{$i=$_%6+1;print chr${[3.55*$i**5-57.583*$i**4+347.75*$i**3-972.92*
+$i**2+1249.2*$i-463.5,-0.55*$i**5+10.208*$i**4-69.833*$i**3+215.29*$i
+**2-292.12*$i+247.5,1.25*$i**5-25.333*$i**4+191.25*$i**3-672.17*$i**2
++1099*$i-561.5,0.5833*$i**5-9.4583*$i**4+56.167*$i**3-148.54*$i**2+16
+9.25*$i+36.5]}[$_/6]}(0..23)
[download]

Update 3 Shaved another char off (305)

map{print chr${[3.55*++($i=$_%6)**5-57.583*$i**4+347.75*$i**3-972.92*$
+i**2+1249.2*$i-463.5,-0.55*$i**5+10.208*$i**4-69.833*$i**3+215.29*$i*
+*2-292.12*$i+247.5,1.25*$i**5-25.333*$i**4+191.25*$i**3-672.17*$i**2+
+1099*$i-561.5,0.5833*$i**5-9.4583*$i**4+56.167*$i**3-148.54*$i**2+169
+.25*$i+36.5]}[$_/6]}(0..23)
[download]