1,2

A001951 and A001952 are the bisections of this sequence - Klaus Brockhaus and Henry Bottomley, Feb 04 2006. This implies the asymptotic result stated in the formula line.

Table of n, a(n) for n=1..70.

For even n, the ratio a(n)/a(n-1) is asymptotic to 1+sqrt(2) as n becomes large.

Sequence in context: A202845 A202838 A105354 * A260220 A249742 A246276

Adjacent sequences: A094074 A094075 A094076 * A094078 A094079 A094080

nonn

John W. Layman, Apr 29 2004

approved