1,1

Variant of A057062. - R. J. Mathar, Dec 13 2008

G. C. Greubel, Table of n, a(n) for n = 1..5000

a(n) = A003056(A000040(n)) + 1 = A002024(A000040(n) + 1).

f[n_] := Round[Sqrt[2n + 2]]; Table[f[Prime[n]], {n, 90}] (* Ray Chandler, Nov 13 2006 *)

Cf. A000040, A000217, A002024, A003056.

Sequence in context: A196393 A274089 A086335 * A123070 A057361 A136409

Adjacent sequences: A123384 A123385 A123386 * A123388 A123389 A123390

easy,nonn

Giovanni Teofilatto, Nov 10 2006

Extended by Ray Chandler, Nov 13 2006

approved