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 A351710 #5 Feb 16 2022 20:12:40
%S A351710 0,1,1,2,1,30,1,720,720,40440,1,3991680,1,479006640,482630400,
%T A351710 87178291200,1,22230464256000,1,6403681380096000,6402460884019200,
%U A351710 2432902008216556800,1,1175091669949317120000,2432902008176640000,620448401733245666380800,620448401733239439360000
%N A351710 a(n) = Sum_{p|n, p prime} (n-p)!.
%F A351710 a(A000040(n)) = 1.
%e A351710 a(6) = 30; a(6) = Sum_{p|6} (6-p)! = (6-2)! + (6-3)! = 4*3*2*1 + 3*2*1 = 30.
%Y A351710 Cf. A000040, A000142, A062363, A351708, A351709.
%K A351710 nonn
%O A351710 1,4
%A A351710 _Wesley Ivan Hurt_, Feb 16 2022