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A341303 a(n) = n!-6*Catalan(n)+5*2^n+4*binomial(n,2)-2*Fibonacci(n)-14*n+20. 0
2, 2, 8, 228, 3086, 32998, 336238, 3533094, 39574232, 477773836, 6222604044, 87162325914, 1307616361780, 20922578067962, 355686650879752, 6402370841201732, 121645089807866376, 2432901968797147330, 51090942024922302314, 1124000727228733234894 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..22.

Michael Engen and Vincent Vatter, Containing all permutations, Amer. Math. Monthly, 128 (2021), 4-24; arXiv preprint, arXiv:1810.08252 [math.CO], 2018-2020.

CROSSREFS

Cf. A000045, A000108.

Sequence in context: A069561 A180370 A326939 * A011148 A176020 A048650

Adjacent sequences:  A341300 A341301 A341302 * A341304 A341305 A341306

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 13 2021

STATUS

approved

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Last modified September 19 08:54 EDT 2021. Contains 347556 sequences. (Running on oeis4.)