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%I #5 Apr 02 2022 04:13:56
%S 1,2,4,10,23,56,132,316,752,1793,4272,10183,24266,57833
%N Row sums of triangle A137680.
%C Partial sums of A137681 prefaced with a 1 = left border of triangle A137680: (1, 1, 3, 7, 17, 40, 96, 228, ...) = A137682. A variation of A137681 = column 2 of triangle A137680: (1, 0, 2, 4, 10, 23, 56, 132, 316, ...).
%e a(4) = 10 = sum of row 4 terms of triangle A137680: (7 + 2 + 0 + 1).
%Y Cf. A137680, A137682.
%K nonn
%O 1,2
%A _Gary W. Adamson_, Feb 05 2008
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