A203192 (n-1)-st elementary symmetric function of the first n terms of (1,2,1,4,1,6,1,8,...)=(A124625 for n>1).

1, 3, 5, 22, 30, 188, 236, 1936, 2320, 23584, 27424, 332928, 379008, 5352192, 5997312, 96602112, 106924032, 1934954496, 2120749056, 42600775680, 46316666880, 1022682562560, 1104432168960, 26588121661440, 28550112215040

Offset

1,2

Links

Table of n, a(n) for n=1..25.

Mathematica

f[k_] := If[Mod[k, 2] == 1, 1, k];
t[n_] := Table[f[k], {k, 1, n}]
a[n_] := SymmetricPolynomial[n - 1, t[n]]
Table[a[n], {n, 1, 33}] (* A203192 *)

Crossrefs

Cf. A124625.

Sequence in context: A370580 A025093 A025112 * A025098 A025117 A318076

Adjacent sequences: A203189 A203190 A203191 * A203193 A203194 A203195

Keyword

nonn

Author

Clark Kimberling, Dec 30 2011

Status

approved