1,3

Table of n, a(n) for n=1..90.

a(n) = (2*A000194(n)) - A074294(n).

Flatten[Table[Range[2n-1, 0, -1], {n, 10}]] (* Harvey P. Dale, Oct 08 2012 *)

Sequence in context: A031251 A194885 A128317 * A279318 A084269 A051427

Adjacent sequences: A179750 A179751 A179752 * A179754 A179755 A179756

nonn

Antti Karttunen, Aug 03 2010

approved