A022466 - OEIS

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A022466

Number of 1's in n-th term of A007651.

1, 2, 1, 3, 4, 3, 4, 6, 8, 12, 13, 18, 24, 33, 39, 52, 67, 88, 113, 155, 211, 264, 331, 455, 596, 762, 1000, 1288, 1688, 2222, 2884, 3754, 4915, 6364, 8300, 10845, 14138, 18372, 23966, 31254, 40821, 53113, 69336, 90273, 117678, 153518, 199990, 260671, 340007

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Peter J. C. Moses, Table of n, a(n) for n = 1..1000

MATHEMATICA

p={10, -3, 15, -13, 26, -10, -18, -33, 21, -3, 9, -22, 40, 8, 12, -52, -19, 73, 38, 5, 14, -25, -35, -20, -25, 53, 29, 4, -91, -43, 42, 18, 36, -5, -99, 10, 7, 55, 44, -44, -53, -5, 15, 47, -19, -23, 13, 21, 18, -55, -39, 15, 35, 36, -7, -23, -9, -3, 3, 2, 1, 2, 6, 6, -2, -9, -5, 2, 7, 3, -1, -1, -2, -2, -1, 0, 2, 1}; q={-6, 3, -6, 12, -4, 7, -7, 1, 0, 5, -2, -4, -12, 2, 7, 12, -7, -10, -4, 3, 9, -7, 0, -8, 14, -3, 9, 2, -3, -10, -2, -6, 1, 10, -3, 1, 7, -7, 7, -12, -5, 8, 6, 10, -8, -8, -7, -3, 9, 1, 6, 6, -2, -3, -10, -2, 3, 5, 2, -1, -1, -1, -1, -1, 1, 2, 2, -1, -2, -1, 0, 1}; gf=Fold[x #1+#2&, 0, p]/Fold[x #1+#2&, 0, q]; CoefficientList[Series[gf, {x, 0, 99}], x] (* Peter J. C. Moses, Jun 24 2013 *)

CROSSREFS

Cf. A007651.

Sequence in context: A301453 A278340 A324749 * A144254 A378020 A133310

Adjacent sequences: A022463 A022464 A022465 * A022467 A022468 A022469

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved