|
%I
%S 0,0,1,2,0,3,4,5,6,0,7,8,9,10,11,12,0,13,14,15,16,17,18,19,20,0,21,22,
%T 23,24,25,26,27,28,29,30,0,31,32,33,34,35,36,37,38,39,40,41,42,0,43,
%U 44,45,46,47,48,49,50,51,52,53,54,55,56,0,57,58,59,60,61,62,63,64,65,66,67
%N a(n) = 0 unless n is a nonsquare in which case a(n) = k.
%C a(A000037(n)) = n; a(A000290(n)) = 0.
%F a(n) = (1-A010052(n))*A028391(n).
%Y Cf. A000196, A037213.
%K nonn
%O 0,4
%A _Reinhard Zumkeller_, Feb 20 2010
|
