0,2

Equals A010049(n) + A001629(n+2) and A055244(n) + A001629(n-1).

a(4) = 25 = (1, 1, 3, 2, 1) dot (1, 2, 3, 4, 5) = (1 + 2 + 9 + 8 + 5), where (1, 1, 3, 2, 1) = row 4 of triangle A065941.

a(4) = 25 = A010049(4) + A001629(6) = 5 + 20.

a(5) = 48 = A055244(6) + A001619(4) = 43 + 5.

Cf. A065941, A010049, A001629, A005244.

Sequence in context: A047183 A047194 A048039 this_sequence A005406 A005407 A005116

Adjacent sequences: A131910 A131911 A131912 this_sequence A131914 A131915 A131916

nonn

Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 27 2007