%I
%S 1,1,0,3,4,9,13,18,20,30,32,40,45,51,59,67,71,81,90,96,107,117,121,
%T 131,141,149,158,172,180,186,196,208,218,231,241,256,265,277,287,299,
%U 307,323,338,348,363,375,384,395,409,423,434,451,465,479,498,510,521,536,548,562
%N a(k) such that A225281 column k of T(n,k) = n*k*(k1)/2  a(k) for large n
%H R. H. Hardin, <a href="/A225288/b225288.txt">Table of n, a(n) for n = 1..389</a>
%K sign
%O 1,4
%A _R. H. Hardin_ May 04 2013
