A173731 - cp's OEIS frontend

A173731 a(n) = a(n-1) * (11a(n-1) - a(n-2)) / (a(n-1) + 4a(n-2)), a(0) = a(1) = 0, a(2) = 1.

n	a(n)
0	0
1	0
2	1
3	11
4	88
5	638
6	4466
7	30856
8	212135
9	1455685
10	9981840
11	68428140
12	469043796
13	3214953456
14	22035826813
15	151036348463
16	1035219958696
17	7095506886986
18	48633337477670
19	333337879614520
20	2284731883069955
21	15659785467455305

[0, 0, 1, 11, 88, 638, 4466, 30856, 212135, 1455685, 9981840, 68428140, 469043796, 3214953456, 22035826813, 151036348463, 1035219958696, 7095506886986, 48633337477670, 333337879614520, 2284731883069955, 15659785467455305]

cp's OEIS Frontend

A173731 a(n) = a(n-1) * (11a(n-1) - a(n-2)) / (a(n-1) + 4a(n-2)), a(0) = a(1) = 0, a(2) = 1.

Table of values

List of values

cp's OEIS Frontend

A173731 a(n) = a(n-1) * (11*a(n-1) - a(n-2)) / (a(n-1) + 4*a(n-2)), a(0) = a(1) = 0, a(2) = 1.

Table of values

List of values

A173731 a(n) = a(n-1) * (11a(n-1) - a(n-2)) / (a(n-1) + 4a(n-2)), a(0) = a(1) = 0, a(2) = 1.