A238474 - cp's OEIS frontend

A238474 a(n) = (-1)^n(n+3)!/(2(n+1)) for n >= 0.

n	a(n)
0	3
1	-6
2	20
3	-90
4	504
5	-3360
6	25920
7	-226800
8	2217600
9	-23950080
10	283046400
11	-3632428800
12	50295168000
13	-747242496000
14	11856247603200
15	-200074178304000
16	3577797070848000
17	-67580611338240000
18	1344498478202880000
19	-28100018194440192000
20	615524208068689920000

[3, -6, 20, -90, 504, -3360, 25920, -226800, 2217600, -23950080, 283046400, -3632428800, 50295168000, -747242496000, 11856247603200, -200074178304000, 3577797070848000, -67580611338240000, 1344498478202880000, -28100018194440192000, 615524208068689920000]

cp's OEIS Frontend

A238474 a(n) = (-1)^n(n+3)!/(2(n+1)) for n >= 0.

Table of values

List of values

cp's OEIS Frontend

A238474 a(n) = (-1)^n*(n+3)!/(2*(n+1)) for n >= 0.

Table of values

List of values

A238474 a(n) = (-1)^n(n+3)!/(2(n+1)) for n >= 0.