A253832 - cp's OEIS frontend

A253832 a(n) = a(n-1) * (1 + a(n-2)/a(n-4)), a(0) = a(1) = a(2) = a(3) = 1.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	4
6	12
7	60
8	420
9	6720
10	241920
11	27336960
12	15773425920
13	64182070068480
14	4184799332605032960
15	9825130460280752853949440
16	2606675287692747620296839987164160
17	399035505430293222012069797891526139192304640

[1, 1, 1, 1, 2, 4, 12, 60, 420, 6720, 241920, 27336960, 15773425920, 64182070068480, 4184799332605032960, 9825130460280752853949440, 2606675287692747620296839987164160, 399035505430293222012069797891526139192304640]

cp's OEIS Frontend

A253832 a(n) = a(n-1) * (1 + a(n-2)/a(n-4)), a(0) = a(1) = a(2) = a(3) = 1.

Table of values

List of values