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Row sums of triangle A138015.
1

%I #4 Apr 02 2022 14:23:01

%S 1,2,4,6,10,14,24,34,68,102,256,410,1284,2158,8072,13986

%N Row sums of triangle A138015.

%F Repeat each nonzero term of A003422 once, then take partial sums.

%e a(5) = 10 = sum of row 5 terms of triangle A138015: (1 + 2 + 4 + 2 + 1).

%e a(5) = 10 = (1 + 1 + 2 + 2 + 4) since A003422 starting (1, 2, 4, 10, 34, 154, ...) then repeating each term = (1, 1, 2, 2, 4, 4, 10, 10, ...). Take partial sums of the first 5 terms.

%Y Cf. A003422, A138015.

%K nonn

%O 1,2

%A _Gary W. Adamson_, Feb 28 2008