id:A000408 - OEIS Search Results

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Numbers that are the sum of 3 nonzero squares.

+0
20

3, 6, 9, 11, 12, 14, 17, 18, 19, 21, 22, 24, 26, 27, 29, 30, 33, 34, 35, 36, 38, 41, 42, 43, 44, 45, 46, 48, 49, 50, 51, 53, 54, 56, 57, 59, 61, 62, 65, 66, 67, 68, 69, 70, 72, 73, 74, 75, 76, 77, 78, 81, 82, 83, 84, 86, 88, 89, 90, 91, 93, 94, 96, 97, 98, 99, 101, 102, 104 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Ray Chandler, Table of n, a(n) for n=1..10000` `Index entries for sequences related to sums of squares`
	MATHEMATICA	`f[n_] := Flatten[Position[Take[Rest[CoefficientList[Sum[x^(i^2), {i, n}]^3, x]], n^2], _?Positive]]; f[11] (Chandler)`
	CROSSREFS	`Cf. A004214, A024795 (numbers with multiplicity), A000404.` `Sequence in context: A107084 A065940 A024795 this_sequence A025321 A153238 A086883` `Adjacent sequences: A000405 A000406 A000407 this_sequence A000409 A000410 A000411`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com) and J. H. Conway (conway(AT)math.princeton.edu)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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