1,2

a(3) = 25 = sum of row 3 terms, triangle A131422: (6 + 8 + 11).

Cf. A131422.

Sequence in context: A123605 A089613 A062728 this_sequence A004640 A011924 A127813

Adjacent sequences: A131420 A131421 A131422 this_sequence A131424 A131425 A131426

nonn

Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 10 2007