A064268 - cp's OEIS frontend

A064268 a(n) = (a(n-1) * a(n-6) + 2 * a(n-3) * a(n-4)) / a(n-7). a(1) = ... = a(7) = 1. Somos-7 variation.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	3
9	5
10	7
11	13
12	43
13	113
14	521
15	1241
16	3681
17	23657
18	177721
19	679505
20	4674203
21	27273277
22	275517767
23	3496390229
24	37043734803
25	226196947873
26	4391322667601
27	81041508965617
28	1433151398896001
29	25397505914206225
30	472652420405241521
31	9156799134584424289
32	499597377081528480243

[1, 1, 1, 1, 1, 1, 1, 3, 5, 7, 13, 43, 113, 521, 1241, 3681, 23657, 177721, 679505, 4674203, 27273277, 275517767, 3496390229, 37043734803, 226196947873, 4391322667601, 81041508965617, 1433151398896001, 25397505914206225, 472652420405241521, 9156799134584424289, 499597377081528480243]

cp's OEIS Frontend

A064268 a(n) = (a(n-1) * a(n-6) + 2 * a(n-3) * a(n-4)) / a(n-7). a(1) = ... = a(7) = 1. Somos-7 variation.

Table of values

List of values