A204236 - OEIS

A204236

Permanent of the n-th principal submatrix of A204154.

1, 11, 219, 8353, 501441, 43953387, 5289422019, 837277689897, 168675250704201, 42143281220724723, 12789052583333211963, 4633606346714879986017, 1975686665736618600155505, 979311369588813584600206491, 558412149326539306097214853299, 362948190926517939498607117046169

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OFFSET

1,2

LINKS

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

MATHEMATICA

f[i_, j_] := Max[2 i - j, 2 j - i]; (* A204154 *)

m[n_] := Table[f[i, j], {i, 1, n}, {j, 1, n}]

TableForm[m[6]] (* 6x6 principal submatrix *)

Permanent[m_] :=

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

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