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A179904 a(n) = A056520(n)+1 for n>0, a(0)=1. 1
1, 3, 7, 16, 32, 57, 93, 142, 206, 287, 387, 508, 652, 821, 1017, 1242, 1498, 1787, 2111, 2472, 2872, 3313, 3797, 4326, 4902, 5527, 6203, 6932, 7716, 8557, 9457, 10418, 11442, 12531, 13687, 14912, 16208, 17577, 19021, 20542, 22142, 23823, 25587 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Original name: (1,3,5,7,9,..) = A005408 convolved with (1,0,2,3,4,..) = 1 followed by A087156.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1).

FORMULA

From Bruno Berselli, Aug 26 2011: (Start)

G.f.: (1 + x)*(1 - 2*x + 3*x^2 - x^3)/(1 - x)^4.

a(n) = (1/6)*(2*n^3 + 3*n^2 + n + 12) for n>0, a(0)=1. (End)

a(n) = A153056(n) for n > 0. - Georg Fischer, Oct 24 2018

EXAMPLE

a(3) = 16 = 1 + A056250(3) = (1 + 15).

a(4) = 32 = (9, 7, 5, 3, 1) dot (1, 0, 2, 3, 4) = (9 + 0 + 10 + 9 + 4).

CROSSREFS

Cf. A056520, A153056.

Sequence in context: A000412 A192964 A293351 * A298311 A161810 A318604

Adjacent sequences:  A179901 A179902 A179903 * A179905 A179906 A179907

KEYWORD

nonn,easy

AUTHOR

Gary W. Adamson, Jul 31 2010

EXTENSIONS

More terms and a(20) added by Bruno Berselli, Aug 26 2011

STATUS

approved

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Last modified October 21 04:26 EDT 2019. Contains 328291 sequences. (Running on oeis4.)