A271908 a(n) = A186434(n)/4.

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

Offset: 1

Author

N. J. A. Sloane, Apr 22 2016

Keywords

• nonn

Comments

It would be nice to have a formula.

Links

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

Crossrefs

Cf. A186434.