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A115507 Number of circular permutations of {1, 2, ..., n}, where every next element in binary notation has ones at the same or adjacent positions of previous element's binary ones. 3
1, 1, 2, 1, 2, 18, 72, 42, 126, 1080, 5400, 42240, 253440, 3578400, 28627200, 16914240, 54396720, 620978400, 5417102880, 40328285760, 322626286080, 5081458717440, 50814587174400, 426996628531200, 5623077380659200, 115361923377254400 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
CROSSREFS
Sequence in context: A358495 A271225 A349563 * A343259 A173252 A051502
KEYWORD
nonn
AUTHOR
Max Alekseyev, Jan 31 2006
EXTENSIONS
a(21)-a(26) from Max Alekseyev, Mar 18 2023
STATUS
approved

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)