login
A204546
Permanent of the n-th principal submatrix of A204269.
3
1, 0, 1, 2, 6, 8, 48, 288, 1344, 3456, 28512, 212544, 1425600, 6220800, 61378560, 600514560, 5185658880, 31684608000, 374492160000, 4406814720000, 46820229120000, 373098700800000
OFFSET
1,4
MATHEMATICA
f[i_, j_] :=
Floor[(i + j + 3)/4] - Floor[(i + j + 1)/4];
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, 14}, {i, 1, n}]] (* A204545 *)
Permanent[m_] :=
With[{a = Array[x, Length[m]]},
Coefficient[Times @@ (m.a), Times @@ a]];
Table[Permanent[m[n]], {n, 1, 22}] (* A204546 *)
CROSSREFS
Sequence in context: A098239 A140257 A361427 * A192534 A053938 A102381
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jan 16 2012
STATUS
approved