%I #10 Aug 08 2021 03:45:17
%S 0,1,5,13,23,40,54,80,104,131,161,209,231,288,332,376,426,499,549,631,
%T 673,748,826,940,972,1073,1177,1261,1347,1490,1526,1688,1774,1899,
%U 2031,2133,2219,2398,2538,2680,2766,2981,3039,3281,3379,3516,3724,3950,4002
%N a(n) = T(2n-1,n) + T(2n,n+1) + ... + T(3n-3,2n-2) = sum over a period of n-th diagonal of array T given by A049828.
%Y Cf. A049828.
%K nonn
%O 1,3
%A _Clark Kimberling_
%E More terms from _Sean A. Irvine_, Aug 07 2021
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