A142983 - cp's OEIS frontend

A142983 a(1) = 1, a(2) = 2, a(n+2) = 2a(n+1) + (n + 1)(n + 2)*a(n).

n	a(n)
1	1
2	2
3	10
4	44
5	288
6	1896
7	15888
8	137952
9	1419840
10	15255360
11	186693120
12	2387093760
13	33898314240
14	502247692800
15	8123141376000
16	136785729024000
17	2483065912320000
18	46822564905984000
19	942853671825408000
20	19678282007924736000
21	435355106182520832000

[1, 2, 10, 44, 288, 1896, 15888, 137952, 1419840, 15255360, 186693120, 2387093760, 33898314240, 502247692800, 8123141376000, 136785729024000, 2483065912320000, 46822564905984000, 942853671825408000, 19678282007924736000, 435355106182520832000]

cp's OEIS Frontend

A142983 a(1) = 1, a(2) = 2, a(n+2) = 2a(n+1) + (n + 1)(n + 2)*a(n).

Table of values

List of values

cp's OEIS Frontend

A142983 a(1) = 1, a(2) = 2, a(n+2) = 2*a(n+1) + (n + 1)*(n + 2)*a(n).

Table of values

List of values

A142983 a(1) = 1, a(2) = 2, a(n+2) = 2a(n+1) + (n + 1)(n + 2)*a(n).