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Number of permutations of 9 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 1.
4

%I #15 Nov 10 2024 21:46:28

%S 1,0,1,2872754,104650147201049,23575497690601916022516,

%T 24302858067615766089801166488125,

%U 91155245844064069307740171414201519055298,1046031892354833895113128900608177633584652958677057,32119646666355552112999645991677870426882424139287301894021793

%N Number of permutations of 9 copies of 1..n introduced in order 1..n with no element equal to another within a distance of 1.

%H Seiichi Manyama, <a href="/A321669/b321669.txt">Table of n, a(n) for n = 0..70</a>

%F a(n) ~ 9^(7*n + 1/2) * n^(8*n) / (4480^n * exp(8*(n+1))). - _Vaclav Kotesovec_, Nov 24 2018

%Y Row n=9 of A322013.

%Y Cf. A190826, A190830, A190833, A190835, A190836, A190837, A321670.

%K nonn

%O 0,4

%A _Seiichi Manyama_, Nov 16 2018