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 A287280 Number of set partitions of [n] such that for each block all absolute differences between consecutive elements are <= eight. 4
 1, 1, 2, 5, 15, 52, 203, 877, 4140, 21147, 111835, 607726, 3372147, 19006265, 108345829, 622553137, 3596571484, 20854506433, 121247283115, 706276123051, 4119684344466, 24052768332415, 140525287140277, 821384370939660, 4802655803213444, 28087804863005024 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..1000 Alois P. Heinz, G.f. for A287280 Pierpaolo Natalini, Paolo Emilio Ricci, New Bell-Sheffer Polynomial Sets, Axioms 2018, 7(4), 71. Wikipedia, Partition of a set FORMULA G.f.: see link above. a(n) = A287214(n,8). a(n) = A000110(n) for n <= 9. CROSSREFS Column k=8 of A287214. Cf. A000110. Sequence in context: A343669 A276725 A287587 * A287258 A287670 A164863 Adjacent sequences:  A287277 A287278 A287279 * A287281 A287282 A287283 KEYWORD nonn,easy AUTHOR Alois P. Heinz, May 22 2017 STATUS approved

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Last modified November 28 04:43 EST 2021. Contains 349400 sequences. (Running on oeis4.)