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 A022557 Numbers that are not the sum of a square and 2 nonnegative cubes. 6
 7, 14, 15, 19, 21, 22, 23, 30, 40, 42, 46, 47, 48, 56, 59, 61, 62, 67, 75, 78, 85, 86, 87, 93, 94, 96, 98, 104, 105, 106, 110, 111, 112, 115, 117, 119, 120, 124, 131, 138, 139, 143, 147, 157, 159, 163, 166, 167, 173, 176, 180, 181, 183, 184, 187, 194, 195, 199, 200, 202 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. J. Mathar, Table of n, a(n) for n = 1..9477 MAPLE isA022557 := proc(n) not isA022556(n) ; end proc: n := 1: for c from 0 do if isA022557(c) then printf("%d %d\n", n, c); n := n+1 ; end if; end do: # R. J. Mathar, Sep 02 2016 MATHEMATICA smax = 50000; A022556 = Table[s = i^2 + j^3 + k^3; If[s <= smax, s, Nothing], {i, 0, Sqrt[smax] // Ceiling}, {j, 0, smax^(1/3) // Ceiling}, {k, j, smax^(1/3) // Ceiling}] // Flatten // Union; Complement[Range[smax], A022556] (* Jean-François Alcover, Feb 20 2023 *) CROSSREFS Cf. A022556 (complement). Sequence in context: A232797 A354791 A107976 * A307546 A297261 A296705 Adjacent sequences: A022554 A022555 A022556 * A022558 A022559 A022560 KEYWORD nonn AUTHOR N. J. A. Sloane. STATUS approved

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Last modified September 23 06:42 EDT 2023. Contains 365533 sequences. (Running on oeis4.)