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 A204266 Permanent of the n-th principal submatrix of A204123. 1
 1, 5, 27, 252, 2369, 36103, 518000, 9756177, 200951191, 4899768134, 113249415026, 3553351288210, 105127854228522, 3433390910771142, 122658122808278570, 4957371400718135098, 191264018429152335168 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS 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_] :=   With[{a = Array[x, Length[m]]},    Coefficient[Times @@ (m.a), Times @@ a]]; Table[Permanent[m[n]], {n, 1, 14}]  (* A204266 *) CROSSREFS Cf. A204123. Sequence in context: A105631 A167019 A230563 * A266204 A300621 A265907 Adjacent sequences:  A204263 A204264 A204265 * A204267 A204268 A204269 KEYWORD nonn AUTHOR Clark Kimberling, Jan 14 2012 STATUS approved

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Last modified November 26 09:38 EST 2020. Contains 338639 sequences. (Running on oeis4.)