0,2

a(n) = A000041(n) * A000070(n), where A000041 = the number of partitions of n and A000070 = partial sums of A000041. Equals row sums of triangle A143228.

a(4) = 60 = A000041(4) * A000070(4) = 5 *12.

a(4) = 60 = sum of row 4 terms of row 4 in triangle A143228: (5 + 5 + 10 + 15 + 25).

Cf. A143228, A000041, A000070.

Sequence in context: A014409 A109782 A123044 this_sequence A123285 A143212 A107361

Adjacent sequences: A143226 A143227 A143228 this_sequence A143230 A143231 A143232

nonn

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