A142988 - cp's OEIS frontend

A142988 a(1) = 1, a(2) = 3, a(n+2) = 3a(n+1) + (n + 1)(n + 3)*a(n).

n	a(n)
1	1
2	3
3	17
4	96
5	696
6	5448
7	49752
8	492480
9	5457600
10	65128320
11	850296960
12	11864240640
13	178442611200
14	2848854758400
15	48517709184000
16	872011090944000
17	16589133517824000
18	331426982928384000
19	6966369015201792000

[1, 3, 17, 96, 696, 5448, 49752, 492480, 5457600, 65128320, 850296960, 11864240640, 178442611200, 2848854758400, 48517709184000, 872011090944000, 16589133517824000, 331426982928384000, 6966369015201792000]

cp's OEIS Frontend

A142988 a(1) = 1, a(2) = 3, a(n+2) = 3a(n+1) + (n + 1)(n + 3)*a(n).

Table of values

List of values

cp's OEIS Frontend

A142988 a(1) = 1, a(2) = 3, a(n+2) = 3*a(n+1) + (n + 1)*(n + 3)*a(n).

Table of values

List of values

A142988 a(1) = 1, a(2) = 3, a(n+2) = 3a(n+1) + (n + 1)(n + 3)*a(n).