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A204239 Permanent of the n-th principal submatrix of A204237.

%I A204239 #6 Jul 12 2012 00:39:59
%S A204239 2,33,1112,69908,6960472,1010678724,201542214592,52862893123648,
%T A204239 17646889124736128,7306075691359891008,3673978840975236778496,
%U A204239 2205779786212911066883328,1558502652244224074264296960
%N A204239 Permanent of the n-th principal submatrix of A204237.
%t A204239 f[i_, j_] := Max[3 i - j, 3 j - i];
%t A204239 m[n_] := Table[f[i, j], {i, 1, n}, {j, 1, n}]
%t A204239 TableForm[m[8]] (* 8x8 principal submatrix *)
%t A204239 Flatten[Table[f[i, n + 1 - i],
%t A204239   {n, 1, 12}, {i, 1, n}]]     (* A204237 *)
%t A204239 Table[Det[m[n]], {n, 1, 22}]  (* A204238 *)
%t A204239 Permanent[m_] :=
%t A204239   With[{a = Array[x, Length[m]]},
%t A204239    Coefficient[Times @@ (m.a), Times @@ a]];
%t A204239 Table[Permanent[m[n]], {n, 1, 14}] (* A204239 *)
%Y A204239 Cf. A204237, A204238.
%K A204239 nonn
%O A204239 1,1
%A A204239 _Clark Kimberling_, Jan 13 2012