1,9

Table of n, a(n) for n=1..84.

(PARI) a(n)=sum(i=1, n, sum(j=1, i, sum(k=1, j, if(n%(prime(i)+prime(j)+prime(k)), 0, 1))))

Sequence in context: A029309 A049819 A284566 * A231205 A003984 A087061

Adjacent sequences: A079053 A079054 A079055 * A079057 A079058 A079059

nonn

Benoit Cloitre, Feb 02 2003

approved