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A023407 If any power of 2 ends with k 3's and 6's, they must be the first k elements of this sequence in reverse order. 3
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 (list; graph; refs; listen; history; text; internal format)
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: A085670 A011410 A298206 * A153841 A334843 A021616

Adjacent sequences:  A023404 A023405 A023406 * A023408 A023409 A023410

KEYWORD

nonn,base

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 4 11:54 EDT 2021. Contains 346447 sequences. (Running on oeis4.)