A073527 - OEIS

%I #7 Oct 03 2014 11:21:21

%S 10,11,12,13,14,20,21,22,23,24,42,43,44,45,46,47,48,50,51,52,53,54,55,

%T 56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,78,79,80,81,

%U 82,83,84,85,86,87,88,89,90,100,101,102,103,104,105,106,107,108,109

%N Numbers n such that denominator of Sum_{k=1..n} 1/k^2 is not a square.

%Y Cf. A007407, A073526 (complement).

%K nonn,easy

%O 1,1

%A _N. J. A. Sloane_, Aug 30 2002

%E More terms from _Matthew Conroy_, Sep 09 2002