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A006563 (2*n)!-Sum ((-1)^(i+1)*binomial(n,i)*2^i*(2*i-1)!,i=1..n). 0

%I

%S 1,0,44,-174,117256,-7589530,2965194588,-692238710870,349381845013136,

%T -172725188707732914,125191334490221307940,-102149999612542557845422,

%U 105262879332307879142908440,-125296099002304850701565276234

%N (2*n)!-Sum ((-1)^(i+1)*binomial(n,i)*2^i*(2*i-1)!,i=1..n).

%K sign

%O 0,3

%A _N. J. A. Sloane_.

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Last modified March 20 13:18 EDT 2019. Contains 321345 sequences. (Running on oeis4.)