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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

%I

%S 1,3,14,50,324,1764,14832,109584,1136160,10628640,131172480,

%T 1486442880,21289201920,283465647360,4622628648960,70734282393600,

%U 1294139872972800,22376988058521600,453942134876160000,8752948036761600000

%N (n-1)-st elementary symmetric function of the first n terms of (2,1,4,3,6,5,8,7,...)=A103889.

%C a(2n)=A000254(2n) for n=1,2,3...

%t f[k_] := If[Mod[k, 2] == 0, k - 1, k + 1]

%t t[n_] := Table[f[k], {k, 1, n}]

%t a[n_] := SymmetricPolynomial[n - 1, t[n]]

%t Table[a[n], {n, 1, 14}] (* A203196 *)

%Y Cf. A103889.

%K nonn

%O 1,2

%A _Clark Kimberling_, Dec 30 2011

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Last modified June 19 18:35 EDT 2021. Contains 345144 sequences. (Running on oeis4.)