1,2

a(n)/a(n-1) tends to phi; e.g. a(10)/a(9) = 178/109 = 1.633...

Row sums of triangle A131779

a(4) = 10 = sum of row 4 terms of triangle A131779: (3 + 1 + 5 + 1).

Cf. A131779.

Sequence in context: A101528 A119040 A135104 this_sequence A102006 A118735 A002970

Adjacent sequences: A131777 A131778 A131779 this_sequence A131781 A131782 A131783

nonn

Gary W. Adamson (qntmpkt(AT)yahoo.com), Jul 14 2007