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A023415 If any power of 2 ends with k 8's and 9's, they must be the first k elements of this sequence in reverse order. +0
4
8, 8, 8, 9, 8, 9, 9, 8, 9, 8, 9, 8, 8, 9, 9, 8, 9, 8, 9, 9, 9, 8, 8, 8, 8, 9, 8, 8, 8, 8, 9, 9, 9, 9, 8, 9, 8, 8, 9, 9, 8, 8, 9, 9, 8, 9, 8, 8, 9, 8, 9, 8, 9, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 8, 9, 8, 8, 8, 9, 9, 8, 8, 9, 8, 8, 9, 9, 8, 8, 9, 9, 9, 8, 9, 9, 9, 9, 9, 9, 8, 8, 9, 8, 8, 9, 9, 9, 9, 9, 9, 8, 8, 8, 9, 9, 8, 8, 8 (list; graph; listen)
OFFSET

0,1

COMMENT

Upper limit of backward value of 2^n and n!. - Simon Plouffe (simon.plouffe(AT)gmail.com), Mar 23 2009.

CROSSREFS

Sequence in context: A165926 A166082 A145446 this_sequence A134314 A136050 A077106

Adjacent sequences: A023412 A023413 A023414 this_sequence A023416 A023417 A023418

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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