1,3

It seems limit n -> infinity a(n)/n exists = 0.7.. (see link).

Table of n, a(n) for n=1..69.

Benoit Cloitre, Plot of a(n)/n

Sequence in context: A039733 A179510 A005374 * A071991 A276952 A096336

Adjacent sequences: A206764 A206765 A206766 * A206768 A206769 A206770

nonn

Benoit Cloitre, Jan 10 2013

approved