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A351360 Number of binary necklaces with n beads and at least three consecutive black beads. 7
0, 0, 1, 2, 3, 5, 9, 17, 31, 60, 113, 220, 419, 813, 1565, 3033, 5855, 11358, 21977, 42644, 82675, 160517, 311609, 605551, 1176871, 2288964, 4453237, 8669002, 16881859, 32892459, 64112225, 125022545, 243898335, 476011102, 929387453, 1815322932 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
Table of n, a(n) for n=1..36.
Marko R. Riedel et al., Necklaces made of black and white beads, Math StackExchange, Feb 2022.
FORMULA
a(n) = A000031(n) - A093305(n).
CROSSREFS
Cf. A351356, A351357, A351358, A351359, A351361.
Sequence in context: A054187 A014743 A345234 * A080889 A049858 A092483
Adjacent sequences: A351357 A351358 A351359 * A351361 A351362 A351363
KEYWORD
nonn
AUTHOR
Marko Riedel, Feb 08 2022
STATUS
approved

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Last modified August 29 13:55 EDT 2024. Contains 375517 sequences. (Running on oeis4.)