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1,1

Table of n, a(n) for n=1..84.

4+1=5, 4+2=6, 1+3=4, etc.

Cf. A002193.

Sequence in context: A021643 A021181 A082220 * A020504 A011004 A226975

Adjacent sequences: A144519 A144520 A144521 * A144523 A144524 A144525

nonn,base

Juri-Stepan Gerasimov, Dec 15 2008

a(4) changed to 11 and extended by R. J. Mathar, Dec 19 2008

Edited by N. J. A. Sloane, Mar 30 2010

approved