A050235 a(n) is the number of n-digit Keith numbers A007629.

0, 6, 2, 9, 7, 10, 2, 3, 2, 0, 2, 4, 2, 3, 3, 3, 5, 3, 5, 3, 1, 1, 3, 1, 1, 3, 7, 1, 2, 5, 2, 4, 6, 3

Offset

1,2

Links

Table of n, a(n) for n=1..34.

Mike Keith, Keith Numbers

Eric Weisstein's World of Mathematics, Keith Number

Crossrefs

Cf. A007629.

Sequence in context: A243453 A142871 A195411 * A223536 A339410 A235362

Adjacent sequences: A050232 A050233 A050234 * A050236 A050237 A050238

Keyword

nonn,hard,base

Author

Eric W. Weisstein

Extensions

More terms from Eric W. Weisstein using results from D. Lichtblau, Aug 24 2004

a(27)-a(31) from Eric W. Weisstein from computations by Daniel Lichtblau Eric W. Weisstein, Jun 23 2009

a(32)-a(34) from computations by Daniel Lichtblau -- Eric W. Weisstein, Aug 26 2009

Status

approved