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A351359 Number of binary necklaces with n beads and at least two consecutive black beads. 8
0, 1, 2, 3, 5, 9, 15, 28, 50, 93, 169, 321, 591, 1118, 2098, 3973, 7501, 14273, 27103, 51722, 98710, 188935, 361937, 694911, 1335471, 2570966, 4954794, 9562165, 18473141, 35730493, 69176559, 134067508, 260062338, 504918961, 981117305, 1907954345 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
Marko R. Riedel et al., Necklaces made of black and white beads, Math StackExchange, Feb 2022.
FORMULA
a(n) = A000031(n) - A000358(n).
CROSSREFS
Sequence in context: A060013 A092424 A167510 * A191701 A066726 A124642
KEYWORD
nonn
AUTHOR
Marko Riedel, Feb 08 2022
STATUS
approved

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)