A204233 - OEIS

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A204233

Permanent of the n-th principal submatrix of A204016.

0, 1, 4, 49, 792, 18953, 610796, 25648641, 1359184384, 88722005809, 6994262098260, 655126226755025, 71915748374032232, 9144536677714434105, 1333394182537641307324, 221002933797466121742433

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

LINKS

Table of n, a(n) for n=1..16.

MATHEMATICA

f[i_, j_] := Max[Mod[i, j], Mod[j, i]];

m[n_] := Table[f[i, j],

{i, 1, n}, {j, 1, n}] (* A204016 *)

Permanent[m_] :=

With[{a = Array[x, Length[m]]},

Coefficient[Times @@ (m.a), Times @@ a]];