1,1

Harvey P. Dale, Table of n, a(n) for n = 1..1000

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

Total/@Partition[Rest[RealDigits[Sqrt[2], 10, 171][[1]]], 2] (* Harvey P. Dale, Aug 19 2019 *)

Cf. A002193.

Sequence in context: A021643 A021181 A082220 * A020504 A293009 A011004

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