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A271908 a(n) = A186434(n)/4. 3
0, 1, 9, 37, 111, 266, 550, 1006, 1744, 2821, 4349, 6405, 9203, 12804, 17418, 23164, 30348, 39023, 49591, 62073, 76997, 94454, 114768, 138054, 165176, 196019, 231085, 270557, 315283, 365102, 421116, 482950, 552092, 628401, 712437, 804509, 906217, 1016724, 1137140, 1267836, 1410790, 1564903 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

It would be nice to have a formula.

LINKS

Lars Blomberg, Table of n, a(n) for n = 1..10000

CROSSREFS

Cf. A186434.

Sequence in context: A288116 A165394 A213570 * A257448 A288415 A026620

Adjacent sequences:  A271905 A271906 A271907 * A271909 A271910 A271911

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 22 2016

STATUS

approved

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Last modified July 25 07:08 EDT 2021. Contains 346284 sequences. (Running on oeis4.)