A046238 Cubes which are palindromes in base 7.

0, 1, 8, 64, 512, 4096, 125000, 1000000, 8000000, 40707584, 325660672, 2605285376, 13858588808, 110868710464, 886949683712, 4748408986112, 37987271888896, 303898175111168, 1628455122125000, 13027640977000000

Offset

1,3

Links

Table of n, a(n) for n=1..20.

Patrick De Geest, World!Of Numbers, Palindromic cubes in bases 2 to 17.

Formula

a(n) = A046237(n)^3. - Andrew Howroyd, Aug 10 2024

Mathematica

Select[Range[0, 250000]^3, IntegerDigits[#, 7]==Reverse[IntegerDigits[#, 7]]&] (* Harvey P. Dale, Oct 11 2022 *)

Crossrefs

Intersection of A029954 and A000578.

Cf. A046237.

Sequence in context: A001018 A097682 A050738 * A046252 A074113 A074116

Adjacent sequences: A046235 A046236 A046237 * A046239 A046240 A046241

Keyword

nonn,base

Author

Patrick De Geest, May 15 1998

Extensions

Offset corrected by Andrew Howroyd, Aug 10 2024

Status

approved