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A244632 23*n^2. 4
0, 23, 92, 207, 368, 575, 828, 1127, 1472, 1863, 2300, 2783, 3312, 3887, 4508, 5175, 5888, 6647, 7452, 8303, 9200, 10143, 11132, 12167, 13248, 14375, 15548, 16767, 18032, 19343, 20700, 22103, 23552, 25047, 26588, 28175, 29808, 31487, 33212, 34983, 36800 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

First bisection of A195058. - Bruno Berselli, Jul 03 2014

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (3,-3,1).

FORMULA

G.f.: 23*x*(1 + x)/(1 - x)^3.

a(n) = 3*a(n-1) -3*a(n-2) +a(n-3) for n>2.

a(n) = 23*A000290(n). - Omar E. Pol, Jul 03 2014

MATHEMATICA

Table[23 n^2, {n, 0, 40}]

PROG

(MAGMA) [23*n^2: n in [0..40]];

(PARI) a(n)=23*n^2 \\ Charles R Greathouse IV, Jun 17 2017

CROSSREFS

Cf. A195058.

Cf. similar sequences listed in A244630.

Sequence in context: A215613 A306138 A317371 * A042030 A042032 A257976

Adjacent sequences:  A244629 A244630 A244631 * A244633 A244634 A244635

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Jul 03 2014

EXTENSIONS

G.f. corrected by Bruno Berselli, Jul 03 2014

STATUS

approved

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Last modified September 22 05:47 EDT 2019. Contains 327287 sequences. (Running on oeis4.)