0,2

Conjecture: a(n)/a(n-1) tends to phi.

Row sums of triangle A131268 and the reversal triangle A131270.

a(4) = 11 = sum of row 4 terms of triangle A131268: ((1 + 1 + 5 + 3 + 1), or the reversed terms of triangle A131270, row 4.

Cf. A065941, A131268, A131270.

Sequence in context: A024971 A038084 A018169 this_sequence A047081 A090167 A002985

Adjacent sequences: A131266 A131267 A131268 this_sequence A131270 A131271 A131272

nonn

Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 23 2007