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A004436 Numbers that are not the sum of 3 distinct squares. 2
1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 15, 16, 18, 19, 22, 23, 24, 27, 28, 31, 32, 33, 36, 39, 43, 44, 47, 48, 51, 55, 57, 60, 63, 64, 67, 71, 72, 76, 79, 87, 88, 92, 95, 96, 99, 102, 103, 108, 111, 112 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

T. D. Noe, Table of n, a(n) for n=1..1000

Index entries for sequences related to sums of squares

MATHEMATICA

r[n_] := Reduce[0 <= x < y < z && x^2 + y^2 + z^2 == n, {x, y, z}, Integers]; ok[n_] := r[n] == False; Select[ Range[112], ok] (* Jean-Fran├žois Alcover, Dec 05 2011 *)

CROSSREFS

Cf. A001974 (complement)

Sequence in context: A200381 A050118 A081754 * A028237 A194463 A140467

Adjacent sequences:  A004433 A004434 A004435 * A004437 A004438 A004439

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 21 01:33 EST 2019. Contains 329349 sequences. (Running on oeis4.)