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 A352601 #15 Aug 02 2024 05:59:00
%S A352601 1,2,20,336,7920,240240,8910720,390700800,19769460480,1133836704000,
%T A352601 72684900288000,5150244363264000,399703747322880000,
%U A352601 33719008124158156800,3072176295756632064000,300649528529562820608000,31451820032947491201024000,3502589049123697883750400000
%N A352601 a(n) = RisingFactorial(2*n, n) = A124320(2*n, n).
%F A352601 a(n) ~ 3^(3*n - 1/2) * n^n / (2^(2*n - 1/2) * exp(n)). - _Vaclav Kotesovec_, Aug 02 2024
%t A352601 Table[Pochhammer[2*n, n], {n, 0, 17}] (* _Amiram Eldar_, Mar 22 2022 *)
%o A352601 (Sage)
%o A352601 def a(n): return rising_factorial(2*n, n)
%o A352601 print([a(n) for n in range(18)])
%o A352601 (Python)
%o A352601 from sympy import rf
%o A352601 def A352601(n): return rf(2*n,n) # _Chai Wah Wu_, Mar 22 2022
%Y A352601 Cf. A124320.
%K A352601 nonn
%O A352601 0,2
%A A352601 _Peter Luschny_, Mar 22 2022