A374360 a(n) is the permanent of the n X n matrix whose generic element is abs(s(i+3,j)) where 1<= i,j <= n and s(r,c) is a Stirling number of the 1st kind.

1, 6, 564, 306096, 564505464, 2625790073064, 27398936076368184, 584616801786680299848, 23661396380641487392884216, 1707763221685376355443856875112, 208836912138505980452592269085336072, 41452742977042741902029728999187937151368, 12878287403223722868703002883355321706487115016

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Example

a(3) = 306096:
  [  6,  11,   6]
  [ 24,  50,  35]
  [120, 274, 225]

Mathematica

a[n_]:=Permanent[Table[Abs[StirlingS1[i+3, j]], {i, n}, {j, n}]]; Join[{1}, Array[a, 12]]

Crossrefs

Cf. A000400 (determinant), A048994, A132393, A372343.

Sequence in context: A341871 A226263 A029590 * A332156 A291953 A225206

Adjacent sequences: A374357 A374358 A374359 * A374361 A374362 A374363

Keyword

nonn

Author

Stefano Spezia, Jul 06 2024

Status

approved