1,1

The nonzero terms of A139401.

Table of n, a(n) for n=1..105.

a(n) = A139401(A000037(n)).

a(1) = 3 because the first nonsquare positive integer is 2 and 2 is not a quadratic residue modulo 3.

Sequence in context: A046536 A052384 A276867 * A220196 A128200 A258168

Adjacent sequences: A100864 A100865 A100866 * A100868 A100869 A100870

nonn

Guilherme de Queiroz Hobbs (guilhermehobbs(AT)uol.com.br), Jan 08 2005

Corrected and extended by David Wasserman, Mar 04 2008

Edited by Max Alekseyev, May 11 2010

approved