1,7

Sequence A131109 shows that a(n+1)-a(n) can be larger than 1. [From T. D. Noe, Apr 12 2010]

The differences exceed 1 for the first time between a(186) = 59 and a(187) = 61. [R. J. Mathar, Apr 12 2010]

Table of n, a(n) for n=1..81.

Cf. A176044, A001358, A106146.

Sequence in context: A108956 A289133 A135297 * A171481 A230775 A108037

Adjacent sequences: A176143 A176144 A176145 * A176147 A176148 A176149

base,easy,nonn

Giovanni Teofilatto, Apr 10 2010

approved