Convolution of natural numbers >= 2 and the partition numbers (A000041).
2, 5, 11, 21, 38, 64, 105, 165, 254, 381, 562, 813, 1162, 1636, 2279, 3139, 4285
1 seqfan posts
Fri May 18 09:35:17 CEST 2012 [seqfan] Counting factorizations: A001055 and friends