1,2

a(5) = 17 = sum of row 5 terms of triangle A137855: (1 + 2 + 5 + 8 + 1).

Cf. A137855.

Sequence in context: A003008 A054199 A054197 this_sequence A090375 A104879 A156805

Adjacent sequences: A137853 A137854 A137855 this_sequence A137857 A137858 A137859

nonn

Gary W. Adamson (qntmpkt(AT)yahoo.com), Feb 18 2008