1,2

A026794 * A000005. (A026794 as an infinite lower triangular matrix and d(n) as a vector).

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).

Cf. A000005, A026794, A137639.

Sequence in context: A058074 A123722 A096185 this_sequence A113057 A047343 A005047

Adjacent sequences: A137637 A137638 A137639 this_sequence A137641 A137642 A137643

nonn

Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 31 2008