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 A084259 #15 May 08 2025 02:23:32 %S A084259 6,48,1440,103680,14515200,3483648000,1316818944000,737418608640000, %T A084259 584035538042880000,630758381086310400000,901984484953423872000000, %U A084259 1666867328193927315456000000,3900469547973789918167040000000 %N A084259 a(n) = n! * (n+1)! * (n+2)! * (n+3). %t A084259 a[n_] := n! * (n+1)! * (n+2)! * (n+3); Array[a, 15, 0] (* _Amiram Eldar_, May 07 2025 *) %Y A084259 Cf. A000142, A010790, A176037. %K A084259 nonn %O A084259 0,1 %A A084259 _Benoit Cloitre_, Jun 21 2003 %E A084259 Definition adapted to data by _Georg Fischer_, May 10 2021