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 A026496 a(n) = least positive integer > a(n-1) and not a(i)^2 + a(j)^2 + a(k)^2 for 1<=i<=j<=k<=n. 0
 1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 15, 16, 17, 19, 20, 22, 23, 25, 26, 28, 29, 31, 32, 34, 35, 37, 38, 39, 40, 41, 43, 44, 46, 47, 49, 50, 52, 53, 55, 56, 58, 59, 60, 61, 62, 63, 64, 65, 67, 68, 70, 71, 73, 74, 76, 77, 79, 80, 82, 83, 85, 86, 87, 88, 89, 91, 92, 94, 95, 97, 98, 100 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..72. MATHEMATICA FixedPoint[Complement[Range@100, Flatten@Outer[Plus, #^2, #^2, #^2]] &, {}] (* Ivan Neretin, Feb 15 2016 *) CROSSREFS Sequence in context: A307513 A186515 A078934 * A056127 A186352 A186157 Adjacent sequences: A026493 A026494 A026495 * A026497 A026498 A026499 KEYWORD nonn AUTHOR Clark Kimberling EXTENSIONS Corrected, more terms added by Ivan Neretin, Feb 16 2016 STATUS approved

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Last modified December 5 09:29 EST 2023. Contains 367589 sequences. (Running on oeis4.)