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.

Showing 1-2 of 2 results.

A127233 a(n) = n!*(n*(n+1)/2)!.

Original entry on oeis.org

1, 1, 12, 4320, 87091200, 156920924160000, 36785478363630796800000, 1536637256843037856927580160000000, 14998770936168817088309737749441675264000000000, 43408511507665453002645192043544271642563569306828800000000000
Offset: 0

Views

Author

Artur Jasinski, Jan 09 2007

Keywords

Crossrefs

Cf. A127234, A127236.

Programs

  • Maple
    seq(n!*(n*(n+1)/2)!,n=0..9); # Emeric Deutsch, Jan 20 2007
  • Mathematica
    Table[n!((n(n+1))/2)!,{n,0,10}] (* Harvey P. Dale, Aug 27 2021 *)

Extensions

More terms from Emeric Deutsch, Jan 20 2007

A127235 a(n) = n! (2*sum(1..n-1))!.

Original entry on oeis.org

1, 4, 4320, 11496038400, 291948240981196800000, 190982059064777562218142105600000000, 7081230833474514688657438735472338312479375360000000000
Offset: 1

Views

Author

Artur Jasinski, Jan 09 2007, Jan 11 2007

Keywords

Comments

Number of distinct n x n matrices containing n^2 different elements which have that same trace.

Crossrefs

Cf. A127233, A127234.

Programs

  • Mathematica
    Table[n! (2*Sum[x, {x, 1, n - 1}])!, {n, 1, 10}]
Showing 1-2 of 2 results.

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