A287596 - cp's OEIS frontend

A287596 a(n) is the denominator of r(n), where r(n) = r(n-1) + r(n-2)/(2*(n-1)) with r(0) = 0, r(1) = 1.

n	a(n)
0	1
1	1
2	1
3	4
4	12
5	96
6	480
7	5760
8	8064
9	645120
10	5806080
11	116121600
12	1277337600
13	6131220480
14	398529331200
15	11158821273600
16	167382319104000
17	5356234211328000
18	18211196318515200
19	3278015337332736000
20	62282291409321984000
21	146546568021934080000
22	52317124783830466560000

[1, 1, 1, 4, 12, 96, 480, 5760, 8064, 645120, 5806080, 116121600, 1277337600, 6131220480, 398529331200, 11158821273600, 167382319104000, 5356234211328000, 18211196318515200, 3278015337332736000, 62282291409321984000, 146546568021934080000, 52317124783830466560000]

cp's OEIS Frontend

A287596 a(n) is the denominator of r(n), where r(n) = r(n-1) + r(n-2)/(2*(n-1)) with r(0) = 0, r(1) = 1.

Table of values

List of values