A094116 Partial sums of A093348.

0, 1, 1, 2, 2, 7, 11, 16, 20, 25, 25, 26, 26, 27, 27, 32, 36, 41, 45, 50, 50, 51, 51, 52, 52, 77, 101, 126, 150, 175, 195, 216, 236, 257, 277, 302, 326, 351, 375, 400, 420, 441, 461, 482, 502, 527, 551, 576, 600, 625, 625, 626, 626, 627, 627, 632, 636, 641, 645, 650

Offset

1,4

Links

Table of n, a(n) for n=1..60.

Formula

a(5^k)=(25^k-1)/12

Prog

(PARI) a(n)=sum(k=1, n, -sum(i=1, k-1, (-1)^i*5^valuation(i, 5)))

Crossrefs

Sequence in context: A005223 A118680 A278457 * A079476 A005298 A063692

Adjacent sequences: A094113 A094114 A094115 * A094117 A094118 A094119

Keyword

nonn

Author

Benoit Cloitre, May 03 2004

Status

approved