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%I #6 Aug 22 2020 19:33:21
%S 2,3,4,6,7,8,9,10,11,12,13,15,16,17,18,19,20,21,22,23,24,25,26,27,28,
%T 29,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,
%U 53,54,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82
%N Numbers that are not square pyramidal numbers.
%C Numbers not of the form 0^2 + 1^2 + 2^2 + ... + m^2 = m*(m + 1)*(2*m + 1)/6.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/SquarePyramidalNumber.html">Square Pyramidal Number</a>
%t Module[{nn=6,m},m=(nn(nn+1)(2nn+1))/6 ;Complement[Range[m],Table[(n(n+1)(2n+1))/6,{n,nn}]]] (* _Harvey P. Dale_, Aug 22 2020 *)
%Y Complement of A000330.
%Y Cf. A000037, A014132, A145397, A253903.
%K nonn,easy
%O 1,1
%A _Ilya Gutkovskiy_, Mar 31 2018
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