A081407 - cp's OEIS frontend

A081407 4th-order non-linear ("factorial") recursion: a(0)=a(1)=a(2)=a(3)=1, a(n) = (n+1)*a(n-4).

n	a(n)
0	1
1	1
2	1
3	1
4	5
5	6
6	7
7	8
8	45
9	60
10	77
11	96
12	585
13	840
14	1155
15	1536
16	9945
17	15120
18	21945
19	30720
20	208845
21	332640
22	504735
23	737280
24	5221125
25	8648640
26	13627845
27	20643840
28	151412625
29	259459200
30	422463195
31	660602880
32	4996616625
33	8821612800

[1, 1, 1, 1, 5, 6, 7, 8, 45, 60, 77, 96, 585, 840, 1155, 1536, 9945, 15120, 21945, 30720, 208845, 332640, 504735, 737280, 5221125, 8648640, 13627845, 20643840, 151412625, 259459200, 422463195, 660602880, 4996616625, 8821612800]

cp's OEIS Frontend

A081407 4th-order non-linear ("factorial") recursion: a(0)=a(1)=a(2)=a(3)=1, a(n) = (n+1)*a(n-4).

Table of values

List of values