A203238 - cp's OEIS frontend

A203238 a(n)=(n-1)-st elementary symmetric function of the first n terms of (2, -4, 6, -8, 10, ...).

n	a(n)
1	1
2	-2
3	-20
4	112
5	1504
6	-14208
7	-244992
8	3274752
9	69267456
10	-1199554560
11	-30106091520
12	640796590080
13	18622701895680
14	-470423898685440
15	-15541046083584000
16	454463600984064000
17	16822958391558144000
18	-559005839520694272000

[1, -2, -20, 112, 1504, -14208, -244992, 3274752, 69267456, -1199554560, -30106091520, 640796590080, 18622701895680, -470423898685440, -15541046083584000, 454463600984064000, 16822958391558144000, -559005839520694272000]

cp's OEIS Frontend

A203238 a(n)=(n-1)-st elementary symmetric function of the first n terms of (2, -4, 6, -8, 10, ...).

Table of values

List of values