A350309 - cp's OEIS frontend

A350309 a(n) = (n+2)a(n-1) + (n+1)(A003422(n) - 4)/6 for n > 0 with a(0) = 1.

n	a(n)
0	1
1	2
2	7
3	35
4	215
5	1535
6	12455
7	113255
8	1141415
9	12632615
10	152341415
11	1988514215
12	27934434215
13	420236744615
14	6740662856615
15	114841743944615
16	2071122598472615
17	39418302548552615
18	789563088403016615
19	16603426141551176615
20	365724864314899016615
21	8421063413387754056615

[1, 2, 7, 35, 215, 1535, 12455, 113255, 1141415, 12632615, 152341415, 1988514215, 27934434215, 420236744615, 6740662856615, 114841743944615, 2071122598472615, 39418302548552615, 789563088403016615, 16603426141551176615, 365724864314899016615, 8421063413387754056615]

cp's OEIS Frontend

A350309 a(n) = (n+2)a(n-1) + (n+1)(A003422(n) - 4)/6 for n > 0 with a(0) = 1.

Table of values

List of values

cp's OEIS Frontend

A350309 a(n) = (n+2)*a(n-1) + (n+1)*(A003422(n) - 4)/6 for n > 0 with a(0) = 1.

Table of values

List of values

A350309 a(n) = (n+2)a(n-1) + (n+1)(A003422(n) - 4)/6 for n > 0 with a(0) = 1.