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A107947 Partial sums of A107946. 5
1, 2, 3, 5, 6, 8, 11, 16, 17, 19, 22, 27, 33, 41, 52, 68, 69, 71, 74, 79, 85, 93, 104, 120, 137, 156, 178, 205, 238, 279, 331, 399, 400, 402, 405, 410, 416, 424, 435, 451, 468, 487, 509, 536, 569, 610, 662, 730, 799, 870, 944, 1023, 1108, 1201, 1305, 1425, 1562 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Terms at positions 2^k is found in A107948.

LINKS

Ivan Neretin, Table of n, a(n) for n = 1..8192

MATHEMATICA

Accumulate@Nest[Join[#, Accumulate@#] &, {1}, 7] (* Ivan Neretin, Jan 31 2018 *)

PROG

(PARI) {a(n)=local(A=[1, 1], B=[1]); for(i=1, #binary(n), B=concat(B, vector(#B, k, polcoeff(Ser(A)/(1-x), #B+k-1))); A=concat(A, B); ); B[n]}

CROSSREFS

Cf. A107946, A107948.

Sequence in context: A117517 A098491 A280449 * A120768 A271109 A293033

Adjacent sequences:  A107944 A107945 A107946 * A107948 A107949 A107950

KEYWORD

nonn

AUTHOR

Paul D. Hanna, May 28 2005

STATUS

approved

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Last modified March 30 09:49 EDT 2020. Contains 333125 sequences. (Running on oeis4.)