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Number of permutations p of [n] such that |p(i+9) - p(i)| <> 9 for i in [n-9].
1

%I #8 Feb 08 2023 09:36:47

%S 1,1,2,6,24,120,720,5040,40320,362880,3548160,37054080,416551680,

%T 5050368000,65944535040,924630958080,13873661706240,221978587299840,

%U 3774394191052800,67494538767237120,1276009602375352320,25429720417085030400

%N Number of permutations p of [n] such that |p(i+9) - p(i)| <> 9 for i in [n-9].

%Y Column k=9 of A333706.

%Y Cf. A000142.

%K nonn

%O 0,3

%A _Alois P. Heinz_, Feb 07 2023