OFFSET
0,36
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..10000 (terms 1..100 from Antonio Roldán)
EXAMPLE
A(98)=3 because 98 = 12 + 35 + 51 = 1 + 5 + 92 = 1 + 5 + 22 + 70 with 1, 5, 22, 70, 92 pentagonal numbers.
PROG
(PARI){ for (n=1, 100, m=polcoeff(prod(k=1, truncate(1+sqrt(24*n+1))/6, 1+x^(k*(3*k-1)/2)), n); write("B218380.txt", n, " ", m)) }
CROSSREFS
KEYWORD
nonn
AUTHOR
Antonio Roldán, Oct 27 2012
EXTENSIONS
a(0) = 1 prepended by Seiichi Manyama, Dec 09 2017
STATUS
approved