A138016 Row sums of triangle A138015.
1, 2, 4, 6, 10, 14, 24, 34, 68, 102, 256, 410, 1284, 2158, 8072, 13986
Offset: 1
Keywords
Examples
a(5) = 10 = sum of row 5 terms of triangle A138015: (1 + 2 + 4 + 2 + 1). 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.
Formula
Repeat each nonzero term of A003422 once, then take partial sums.