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A053768
Numbers n such that sum of the first n composite numbers is a perfect square.
1
1, 6, 21, 80, 6982, 269563, 779693, 834365, 16176645, 19770092, 41049539, 228612936, 1950787140, 2404785364, 3095996836, 5236785750, 12482382942
OFFSET
1,2
CROSSREFS
KEYWORD
nonn
AUTHOR
G. L. Honaker, Jr., Mar 29 2000
EXTENSIONS
a(9)-a(15) from Donovan Johnson, Dec 04 2009
a(16)-a(17) from Donovan Johnson, Jun 09 2011
STATUS
approved