A172511 - cp's OEIS frontend

A172511 a(n) = a(n-1) * (11a(n-1) - a(n-2)) / (a(n-1) + 4a(n-2)), with a(0) = a(1) = 1.

n	a(n)
0	1
1	1
2	2
3	7
4	35
5	210
6	1365
7	9165
8	62322
9	425867
10	2915551
11	19974626
12	136884937
13	938162617
14	6430103330
15	44072167855
16	302074043195
17	2070443441970
18	14191023001437
19	97266699113157
20	666675822475026
21	4569463931720051

[1, 1, 2, 7, 35, 210, 1365, 9165, 62322, 425867, 2915551, 19974626, 136884937, 938162617, 6430103330, 44072167855, 302074043195, 2070443441970, 14191023001437, 97266699113157, 666675822475026, 4569463931720051]

cp's OEIS Frontend

A172511 a(n) = a(n-1) * (11a(n-1) - a(n-2)) / (a(n-1) + 4a(n-2)), with a(0) = a(1) = 1.

Table of values

List of values

cp's OEIS Frontend

A172511 a(n) = a(n-1) * (11*a(n-1) - a(n-2)) / (a(n-1) + 4*a(n-2)), with a(0) = a(1) = 1.

Table of values

List of values

A172511 a(n) = a(n-1) * (11a(n-1) - a(n-2)) / (a(n-1) + 4a(n-2)), with a(0) = a(1) = 1.