OFFSET
0,3
COMMENTS
There are only 76 nonzero terms.
FORMULA
a(n) = a(75 - n). - David A. Corneth, Aug 22 2020
G.f.: Product_{m=1..5} Sum_{k=0..5} x^(j*k). - Joerg Arndt, Aug 23 2020
EXAMPLE
a(7)=12 because we can write 7=1+1+1+1+1+2, 1+1+1+2+2, 1+2+2+2, 1+1+1+1+3, 1+1+2+3, 2+2+3, 1+3+3, 1+1+1+4, 1+2+4, 3+4, 1+1+5, 2+5. Not allowed are: 1+1+1+1+1+1+1, 16, 7.
MAPLE
g:=product(sum(z^(p*m), m=0..5), p=1..5): series(g, z=0, 80);
PROG
(PARI) nonzeroterms() = {my(res = vector(76)); forvec(x = vector(5, i, [0, 5]), c = x*[1..5]~; res[c+1]++); res} \\ David A. Corneth, Aug 22 2020
CROSSREFS
KEYWORD
AUTHOR
Thomas Wieder, Jan 09 2005
EXTENSIONS
Edited by N. J. A. Sloane, Sep 15 2006
Missing term 23 inserted by David A. Corneth, Aug 22 2020
STATUS
approved