A291461 Kaprekar triples: q^3 = x*10^2n + y*10^n + z, with q = x + y + z and 10^n > q > 10^(n-1) (q = 1 allowed for n = 1).

1, 512, 91125, 26198073, 12519490248, 20301732352, 87824421125, 93824221184, 121213882349, 128711132649, 162324571375, 171323771464, 368910352448, 19902511000000, 87782935806307, 171471879319616, 220721185826504, 470511577514952, 2977097087043793, 9063181647017784

Offset

1,2

Links

Hans Havermann, Table of n, a(n) for n = 1..1000

Formula

a(n) = A006887(n)^3.

Prog

(PARI) m=10; for(q=1, 1e4, if(q<m, q==sumdigits(q^3, m)&&print1(q^3, ", "), m*=10)) \\ See A006887 for slightly more efficient code.

Crossrefs

Cf. A006887.

Sequence in context: A183815 A013701 A187461 * A328200 A181244 A181252

Adjacent sequences: A291458 A291459 A291460 * A291462 A291463 A291464

Keyword

nonn,base

Author

M. F. Hasler, Aug 24 2017

Status

approved