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 A328501 Number of inversion sequences of length n avoiding the consecutive pattern 201. 1
 1, 1, 2, 6, 24, 118, 684, 4548, 34036, 282696, 2577936, 25589100, 274539856, 3164909164, 39006958856, 511759353776, 7120140764224, 104703385864788, 1622530610142744, 26425922582118000, 451264786489454168, 8062192403534869432, 150395837509736576208 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Vaclav Kotesovec, Table of n, a(n) for n = 0..465 Juan S. Auli, Pattern Avoidance in Inversion Sequences, Ph. D. thesis, Dartmouth College, ProQuest Dissertations Publishing (2020), 27964164. Juan S. Auli, Sergi Elizalde, Consecutive Patterns in Inversion Sequences, arXiv:1904.02694 [math.CO], 2019. See Table 3. FORMULA a(n) ~ n! * c * d^n * n^alfa, where d = 1/A240885 = 1/(sqrt(2) * InverseErf(sqrt(2/Pi))) = 0.783976931203547499124248654869812535747328200022..., alfa = 1.9218908815253415257398764962146978742409244378248756048362586275529..., c = 0.05831456121798260255226478044037424484656774525125436523149657... - Vaclav Kotesovec, Oct 18 2019 CROSSREFS Cf. A049774, A071075, A200404. Sequence in context: A193938 A298432 A336072 * A328442 A135106 A248837 Adjacent sequences: A328498 A328499 A328500 * A328502 A328503 A328504 KEYWORD nonn AUTHOR Vaclav Kotesovec and Juan S. Auli, Oct 17 2019 STATUS approved

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Last modified February 2 19:34 EST 2023. Contains 360024 sequences. (Running on oeis4.)