%I A125200
%S A125200 2,17,57,134,260,447,707,1052,1494,2045,2717,3522,4472,5579,6855,8312,
%T A125200 9962,11817,13889,16190,18732,21527,24587,27924,31550,35477,39717,44282,
%U A125200 49184,54435,60047,66032,72402,79169,86345,93942,101972,110447,119379
%N A125200 n*(2*n^2 - n - 2).
%C A125200 a(n) = Sum(4*n*k - n - k: 1<=k<=n), sums of rows of the triangle in A125199.
%C A125200 A003415(A003415(a(n))) = 2*A016969(n-1).
%Y A125200 Sequence in context: A105691 A125609 A100518 this_sequence A071402 A002430 
               A160469
%Y A125200 Adjacent sequences: A125197 A125198 A125199 this_sequence A125201 A125202 
               A125203
%K A125200 nonn
%O A125200 1,1
%A A125200 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 24 2006