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 A204237 Symmetric matrix given by f(i,j)=max(3i-j,3j-i). 4
 2, 5, 5, 8, 4, 8, 11, 7, 7, 11, 14, 10, 6, 10, 14, 17, 13, 9, 9, 13, 17, 20, 16, 12, 8, 12, 16, 20, 23, 19, 15, 11, 11, 15, 19, 23, 26, 22, 18, 14, 10, 14, 18, 22, 26, 29, 25, 21, 17, 13, 13, 17, 21, 25, 29, 32, 28, 24, 20, 16, 12, 16, 20, 24, 28, 32, 35, 31, 27, 23 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE Northwest corner: 2....5....8....11...14...17 5....4....7....10...13...16 8....7....6....9....12...15 11...10...9....8....11...14 14...13...12...11...10...13 MATHEMATICA f[i_, j_] := Max[3 i - j, 3 j - 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}]]  (* A204237 *) Table[Det[m[n]], {n, 1, 22}]  (* A204238 *) Permanent[m_] :=   With[{a = Array[x, Length[m]]},    Coefficient[Times @@ (m.a), Times @@ a]]; Table[Permanent[m[n]], {n, 1, 14}] (* A204239 *) CROSSREFS Cf. A204238, A204239. Sequence in context: A194531 A092394 A027438 * A153162 A168199 A251736 Adjacent sequences:  A204234 A204235 A204236 * A204238 A204239 A204240 KEYWORD nonn,tabl AUTHOR Clark Kimberling, Jan 13 2012 STATUS approved

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Last modified August 21 06:54 EDT 2019. Contains 326162 sequences. (Running on oeis4.)