A023407 If any power of 2 ends with k 3's and 6's, they must be the first k terms of this sequence in reverse order.

6, 3, 3, 6, 6, 3, 6, 3, 6, 3, 3, 3, 3, 3, 6, 3, 3, 3, 6, 3, 3, 3, 3, 3, 6, 6, 3, 3, 6, 3, 3, 6, 3, 6, 3, 3, 3, 6, 3, 6, 3, 6, 6, 3, 3, 6, 3, 6, 6, 6, 3, 3, 3, 3, 6, 6, 3, 6, 3, 3, 3, 6, 6, 6, 3, 6, 3, 3, 6, 6, 6, 3, 6, 6, 3, 3, 6, 3, 3, 3, 6, 3, 3, 6, 3, 6, 3, 3, 6, 6, 3, 3, 6, 3, 3, 6, 3, 3, 6, 3, 6, 3, 6, 3, 6, 3, 3, 3

Offset

1,1

Links

Ray Chandler, Table of n, a(n) for n = 1..10000

Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets

Formula

a(n) = 3*A023396(n).

Crossrefs

Cf. A023396.

Sequence in context: A011410 A356412 A298206 * A153841 A021616 A019164

Adjacent sequences: A023404 A023405 A023406 * A023408 A023409 A023410

Keyword

nonn,base

Author

David W. Wilson

Status

approved