A030160 Cubes in which parity of digits alternates.

0, 1, 8, 27, 125, 216, 343, 729, 5832, 12167, 614125, 658503, 1030301, 1092727, 4741632, 8741816, 27270901, 27818127, 47832147, 381078125, 4767078987, 14905098181, 21670967872, 496981290961, 874545616547, 903670125632

Offset

1,3

Comments

The number ((1+10^2)*(1+10^8)*(1+10^32)*(1+10^128)*(1+10^512))^3 is a term of the sequence. - Giovanni Resta, Aug 16 2018

Links

Giovanni Resta, Table of n, a(n) for n = 1..350

Mathematica

altQ[n_] := n < 10 || Union[Total /@ Partition[ Mod[ IntegerDigits@n, 2], 2, 1]] == {1}; Select[ Range[0, 10^4]^3, altQ[#] &] (* Giovanni Resta, Aug 16 2018 *)

Crossrefs

Cf. A030159, A030161, A030162, A030152.

Sequence in context: A045971 A176509 A179125 * A030162 A153147 A062838

Adjacent sequences: A030157 A030158 A030159 * A030161 A030162 A030163

Keyword

nonn,base

Author

Patrick De Geest

Extensions

Offset changed by Giovanni Resta, Aug 16 2018

Status

approved