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A053768 Numbers n such that sum of the first n composite numbers is a perfect square. 1

%I

%S 1,6,21,80,6982,269563,779693,834365,16176645,19770092,41049539,

%T 228612936,1950787140,2404785364,3095996836,5236785750,12482382942

%N Numbers n such that sum of the first n composite numbers is a perfect square.

%Y Cf. A002808, A000290, A053769.

%K nonn

%O 1,2

%A _G. L. Honaker, Jr._, Mar 29 2000

%E a(9)-a(15) from _Donovan Johnson_, Dec 04 2009

%E a(16)-a(17) from _Donovan Johnson_, Jun 09 2011

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Last modified August 22 03:07 EDT 2017. Contains 290942 sequences.