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 A203196 (n-1)-st elementary symmetric function of the first n terms of (2,1,4,3,6,5,8,7,...)=A103889. 1
 1, 3, 14, 50, 324, 1764, 14832, 109584, 1136160, 10628640, 131172480, 1486442880, 21289201920, 283465647360, 4622628648960, 70734282393600, 1294139872972800, 22376988058521600, 453942134876160000, 8752948036761600000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(2n)=A000254(2n) for n=1,2,3... LINKS MATHEMATICA f[k_] := If[Mod[k, 2] == 0, k - 1, k + 1] t[n_] := Table[f[k], {k, 1, n}] a[n_] := SymmetricPolynomial[n - 1, t[n]] Table[a[n], {n, 1, 14}]  (* A203196 *) CROSSREFS Cf. A103889. Sequence in context: A164304 A098521 A084150 * A320826 A322199 A192882 Adjacent sequences:  A203193 A203194 A203195 * A203197 A203198 A203199 KEYWORD nonn AUTHOR Clark Kimberling, Dec 30 2011 STATUS approved

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Last modified May 13 23:41 EDT 2021. Contains 343868 sequences. (Running on oeis4.)