A204233 - OEIS

%I #7 Jul 12 2012 00:39:59

%S 0,1,4,49,792,18953,610796,25648641,1359184384,88722005809,

%T 6994262098260,655126226755025,71915748374032232,9144536677714434105,

%U 1333394182537641307324,221002933797466121742433

%N Permanent of the n-th principal submatrix of A204016.

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

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

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

%t Permanent[m_] :=

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

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

%t Table[Permanent[m[n]], {n, 1, 16}]  (* A204233 *)

%Y Cf. A204016.

%K nonn

%O 1,3

%A _Clark Kimberling_, Jan 13 2012