A142979 - cp's OEIS frontend

A142979 a(1) = 1, a(2) = 3, a(n+2) = 3a(n+1) + (n+1)^2a(n).

n	a(n)
1	1
2	3
3	13
4	66
5	406
6	2868
7	23220
8	210192
9	2116656
10	23375520
11	281792160
12	3673814400
13	51599514240
14	775673176320
15	12440524320000
16	211848037632000
17	3820318338816000
18	72685037892096000
19	1455838255452672000

[1, 3, 13, 66, 406, 2868, 23220, 210192, 2116656, 23375520, 281792160, 3673814400, 51599514240, 775673176320, 12440524320000, 211848037632000, 3820318338816000, 72685037892096000, 1455838255452672000]

cp's OEIS Frontend

A142979 a(1) = 1, a(2) = 3, a(n+2) = 3a(n+1) + (n+1)^2a(n).

Table of values

List of values

cp's OEIS Frontend

A142979 a(1) = 1, a(2) = 3, a(n+2) = 3*a(n+1) + (n+1)^2*a(n).

Table of values

List of values

A142979 a(1) = 1, a(2) = 3, a(n+2) = 3a(n+1) + (n+1)^2a(n).