This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A179870 #8 Jul 12 2020 13:26:39
%S A179870 4,36,2304,518400,298598400,365783040000,842764124160000,
%T A179870 3344930808791040000,21407557176262656000000,
%U A179870 209815467884550291456000000,3021342737537524196966400000000,61783437639904832303765913600000000
%N A179870 a(n) = ((n-1)! * (n+1)!) ^ 2.
%F A179870 a(n) = A175430(n) ^ 2 = ((Product_(k=1,2,...,n) k*A020725(k)) / n) ^ 2 = ((Product_(k=1,2,...,n) k*(k+1)) / n) ^ 2.
%t A179870 Table[((n-1)!(n+1)!)^2,{n,15}] (* _Harvey P. Dale_, Jul 12 2020 *)
%o A179870 (PARI) a(n)=(n-1)!^4*(n^4+2*n^3+n^2) \\ _Charles R Greathouse IV_, Jan 03 2013
%K A179870 nonn,easy
%O A179870 1,1
%A A179870 _Jaroslav Krizek_, Jul 30 2010