A142991 - cp's OEIS frontend

A142991 a(1) = 1, a(2) = 9, a(n+2) = 9a(n+1)+(n+1)(n+3)*a(n).

n	a(n)
1	1
2	9
3	89
4	936
5	10560
6	127800
7	1657080
8	22965120
9	339252480
10	5326819200
11	88651670400
12	1559600179200
13	28929882240000
14	564490975104000
15	11560712397696000
16	247991610230784000
17	5561409662613504000

[1, 9, 89, 936, 10560, 127800, 1657080, 22965120, 339252480, 5326819200, 88651670400, 1559600179200, 28929882240000, 564490975104000, 11560712397696000, 247991610230784000, 5561409662613504000]

cp's OEIS Frontend

A142991 a(1) = 1, a(2) = 9, a(n+2) = 9a(n+1)+(n+1)(n+3)*a(n).

Table of values

List of values

cp's OEIS Frontend

A142991 a(1) = 1, a(2) = 9, a(n+2) = 9*a(n+1)+(n+1)*(n+3)*a(n).

Table of values

List of values

A142991 a(1) = 1, a(2) = 9, a(n+2) = 9a(n+1)+(n+1)(n+3)*a(n).