1,1

Table of n, a(n) for n=1..47.

a(1) = 5 = (2+3).

a(2) = 13 = (2+3)+(3+5).

a(3) = 31 = (2+3)+(3+5)+(7+11).

Cf. A001043, A102724, A102729.

Sequence in context: A002768 A086522 A234372 * A271997 A332368 A203246

Adjacent sequences: A102722 A102723 A102724 * A102726 A102727 A102728

easy,nonn

Giovanni Teofilatto, Feb 07 2005

Edited and extended by Ray Chandler, Feb 12 2005

approved