A204241 - OEIS

A204241

Permanent of the n-th principal submatrix of A204158.

1, 18, 457, 23672, 1894385, 222366990, 35787014405, 7577453436556, 2041650829418725, 682219727134076250, 276875111860035807025, 134154122874807259146080, 76495123111877275062902585, 50706144718387731766299555750

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

MATHEMATICA

f[i_, j_] := Max[3 i - 2 j, 3 j - 2 i];

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

TableForm[m[8]] (* 8x8 principal submatrix *)

Flatten[Table[f[i, n + 1 - i],

{n, 1, 12}, {i, 1, n}]] (* A204158 *)

Table[Det[m[n]], {n, 1, 22}] (* A204240 *)

Permanent[m_] :=

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

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

Table[Permanent[m[n]], {n, 1, 14}] (* A204241 *)

CROSSREFS

Cf. A204158, A204240.

Sequence in context: A289941 A254211 A086501 * A053115 A084273 A230587

Adjacent sequences: A204238 A204239 A204240 * A204242 A204243 A204244

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 13 2012

STATUS

approved