OFFSET

1,2

COMMENTS

Numbers n such that 3*2^n = x^3 + y^3 + z^3 where x, y, z > 0, is not soluble.

Numbers n such that A007283(n) is not the sum of three positive cubes.

Sequence is finite because 47, 48, and 49 are not in the sequence and the absence of k from the sequence implies the absence of k+3. - Giovanni Resta, Jun 27 2016

EXAMPLE

47 is not a term because 2^47 = (8288^3 + 49808^3 + 66800^3) / 3.

49 is not a term because 2^49 = (13379^3 + 70082^3 + 110309^3) / 3.

CROSSREFS

KEYWORD

nonn,fini,full

AUTHOR

Altug Alkan, Jun 19 2016

STATUS

approved