

A022561


Numbers that are not the sum of 3 nonnegative cubes.


6



4, 5, 6, 7, 11, 12, 13, 14, 15, 18, 19, 20, 21, 22, 23, 25, 26, 30, 31, 32, 33, 34, 37, 38, 39, 40, 41, 42, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 56, 57, 58, 59, 60, 61, 63, 67, 68, 69, 70, 71, 74, 75, 76, 77, 78, 79, 82, 83, 84, 85, 86, 87, 88, 89
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OFFSET

1,1


LINKS

T. D. Noe, Table of n, a(n) for n=1..10000
Index entries for sequences related to sums of cubes


MATHEMATICA

lst1=Range[1359]; lst3=Take[Union[Flatten[Table[a^3+b^3+c^3, {a, 0, 16}, {b, 0, 16}, {c, 0, 16}]]], 234] Complement[lst1, lst3] (* Vladimir Joseph Stephan Orlovsky, Feb 16 2010 *)
Select[Range[90], PowersRepresentations[#, 3, 3] == {} &] (* Bruno Berselli, Nov 09 2012, after Giovanni Resta in A022555 *)


CROSSREFS

Complement of A004825.
Sequence in context: A080723 A288737 A139448 * A213524 A047312 A191164
Adjacent sequences: A022558 A022559 A022560 * A022562 A022563 A022564


KEYWORD

nonn


AUTHOR

N. J. A. Sloane


STATUS

approved



