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A022557
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Numbers that are not the sum of a square and 2 nonnegative cubes.
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6
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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)
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OFFSET
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1,1
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LINKS
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MAPLE
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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;
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MATHEMATICA
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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;
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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