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A025322 Numbers that are the sum of 3 nonzero squares in exactly 2 ways. 0
27, 33, 38, 41, 51, 57, 59, 62, 69, 74, 75, 77, 83, 90, 94, 98, 102, 105, 107, 108, 113, 117, 118, 121, 122, 123, 125, 132, 137, 138, 139, 141, 147, 152, 154, 155, 158, 164, 165, 170, 177, 178, 181, 187, 195, 197, 203, 204, 210, 211, 213, 214, 217, 218, 226, 228, 229, 236 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Index entries for sequences related to sums of squares

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

MATHEMATICA

okQ[n_]:=Length[Select[PowersRepresentations[n, 3, 2], !MemberQ[ #, 0]&]] ==2; Select[Range[250], okQ] (* From Harvey P. Dale, Jul 25 2011 *)

CROSSREFS

Sequence in context: A173136 A030134 A024796 * A151742 A088499 A058902

Adjacent sequences:  A025319 A025320 A025321 * A025323 A025324 A025325

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified February 13 06:53 EST 2012. Contains 205451 sequences.