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a(n) = n! / A284567(n).
2

%I #5 Apr 12 2017 04:43:19

%S 1,1,1,1,1,1,36,36,576,576,57600,57600,57600,57600,2822400,25401600,

%T 25401600,25401600,8230118400,8230118400,3292047360000,3292047360000,

%U 398337730560000,398337730560000,14340158300160000,14340158300160000,2423486752727040000,2423486752727040000,1900013614137999360000,1900013614137999360000

%N a(n) = n! / A284567(n).

%H Antti Karttunen, <a href="/A284568/b284568.txt">Table of n, a(n) for n = 0..120</a>

%F a(n) = A000142(n) / A284567(n) = n! / A284567(n).

%o (Scheme) (define (A284568 n) (/ (A000142 n) (A284567 n)))

%Y Cf. A000142, A284567.

%K nonn

%O 0,7

%A _Antti Karttunen_, Apr 12 2017