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

Author

David W. Wilson

Keywords

• nonn
• base

Links

• Ray Chandler, Table of n, a(n) for n = 1..10000
• Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets

Crossrefs

Cf. A023396.

Formula

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