%I #20 Feb 20 2017 12:11:36
%S 0,1,9,37,111,266,550,1006,1744,2821,4349,6405,9203,12804,17418,23164,
%T 30348,39023,49591,62073,76997,94454,114768,138054,165176,196019,
%U 231085,270557,315283,365102,421116,482950,552092,628401,712437,804509,906217,1016724,1137140,1267836,1410790,1564903
%N a(n) = A186434(n)/4.
%C It would be nice to have a formula.
%H Lars Blomberg, <a href="/A271908/b271908.txt">Table of n, a(n) for n = 1..10000</a>
%Y Cf. A186434.
%K nonn
%O 1,3
%A _N. J. A. Sloane_, Apr 22 2016