A204266 - OEIS

A204266

Permanent of the n-th principal submatrix of A204123.

1, 5, 27, 252, 2369, 36103, 518000, 9756177, 200951191, 4899768134, 113249415026, 3553351288210, 105127854228522, 3433390910771142, 122658122808278570, 4957371400718135098, 191264018429152335168, 8676487463037943766552, 377433133681960165450048, 18780210971968950831128080

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..20.

MATHEMATICA

f[i_, j_] := Floor[Max[i, j]/Min[i, j]];

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}]] (* A204123 *)

Permanent[m_] :=