cp's OEIS Frontend

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.

A092144 a(n) = A092143(n)/n!.

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%I A092144 #9 Feb 05 2024 10:19:37
%S A092144 1,1,1,2,2,12,12,96,288,2880,2880,414720,414720,5806080,87091200,
%T A092144 5573836800,5573836800,1805923123200,1805923123200,722369249280000,
%U A092144 15169754234880000,333734593167360000,333734593167360000,4613547015945584640000,23067735079727923200000
%N A092144 a(n) = A092143(n)/n!.
%H A092144 G. C. Greubel, <a href="/A092144/b092144.txt">Table of n, a(n) for n = 1..200</a>
%t A092144 Table[Product[k^Floor[n/k], {k,n}]/n!, {n,40}] (* _G. C. Greubel_, Feb 05 2024 *)
%o A092144 (PARI) my(z=1); for(i=1,20, fordiv(i,j,z*=j); print1(z/i!, ", "))
%o A092144 (Magma) [(&*[j^Floor(n/j): j in [1..n]])/Factorial(n): n in [1..40]]; // _G. C. Greubel_, Feb 05 2024
%o A092144 (SageMath) [product(j^(n//j) for j in range(1,n+1))//factorial(n) for n in range(1,41)] # _G. C. Greubel_, Feb 05 2024
%Y A092144 Cf. A092143.
%K A092144 nonn
%O A092144 1,4
%A A092144 _Jon Perry_, Mar 31 2004
%E A092144 Terms a(21) onward added by _G. C. Greubel_, Feb 05 2024