A137640 Row sums of triangle A137639.
1, 3, 4, 8, 9, 17, 19, 32, 40, 57, 71, 106, 129, 176
Offset: 1
Keywords
Examples
a(4) = 8 = sum of row 4 terms of triangle A137639: (7 + 2 + 0 + 1). a(4) = 8 = (3, 1, 0, 1) dot (1, 2, 2, 3) = (3 + 2 + 0 + 3); where (3, 1, 0, 1) = row 4 of triangle A026794, the partition triangle and (1, 2, 2, 3) = the first 4 terms of A000005, d(n).