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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 STATUS approved

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