A204251 Permanent of the n-th principal submatrix of A204250.
1, 15, 696, 70380, 13028148, 3964560012, 1842113636352, 1238025608824896, 1154488823507833920, 1445382306218202517440, 2365159362652507207703040, 4947087474421921107685036800, 12980259416603230936506795674880
Offset: 1
Keywords
Crossrefs
Cf. A204250.
Programs
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Mathematica
f[i_, j_] := i*j + i + j - 2; m[n_] := Table[f[i, j], {i, 1, n}, {j, 1, n}] TableForm[m[5]] (* 5x5 principal submatrix *) Flatten[Table[f[i, n + 1 - i], {n, 1, 12}, {i, 1, n}]] (* A204250 *) Permanent[m_] := With[{a = Array[x, Length[m]]}, Coefficient[Times @@ (m.a), Times @@ a]]; Table[Permanent[m[n]], {n, 1, 14}] (* A204251 *)