login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A101105
Row sums of triangle A101224, which is related to the Flavius sieve (A000960).
1
1, 5, 18, 44, 90, 167, 257, 397, 596, 782, 1079, 1404, 1793, 2226, 2813, 3337, 4110, 4848, 5632, 6671, 7773, 8861, 10160, 11792, 13046, 14846, 16653, 18494, 20678, 22985, 25064, 27828, 30431, 33181, 36384, 39617, 42795, 46650, 50873, 54438
OFFSET
1,2
PROG
(PARI) {a(n)=local(A); sum(k=1, n, if(k==1, A=n^2-n+1, A=(n-k+1)*floor((A-1)/(n-k+1))))}
CROSSREFS
Cf. A101224.
Sequence in context: A273532 A160969 A213397 * A037140 A321049 A007237
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 01 2004
STATUS
approved