1,2

a(6) = 15 = (1 + 1 + 2 + 6 + 4 + 1), sum of row 6 terms in triangle A130461.

Cf. A130460, A130461, A130477, A130478.

Sequence in context: A006544 A110536 A049861 this_sequence A096592 A050295 A121649

Adjacent sequences: A130473 A130474 A130475 this_sequence A130477 A130478 A130479

nonn

Gary W. Adamson (qntmpkt(AT)yahoo.com), May 28 2007