A215139 - cp's OEIS frontend

A215139 a(n) = (a(n-1) - a(n-3))*7^((1+(-1)^n)/2) with a(6)=5, a(7)=4, a(8)=22.

n	a(n)
6	5
7	4
8	22
9	17
10	91
11	69
12	364
13	273
14	1428
15	1064
16	5537
17	4109
18	21315
19	15778
20	81683
21	60368
22	312130
23	230447
24	1190553
25	878423
26	4535832
27	3345279
28	17267992
29	12732160
30	65708167
31	48440175
32	249956105
33	184247938
34	950654341
35	700698236
36	3615152086
37	2664497745
38	13746596563
39	10131444477

[5, 4, 22, 17, 91, 69, 364, 273, 1428, 1064, 5537, 4109, 21315, 15778, 81683, 60368, 312130, 230447, 1190553, 878423, 4535832, 3345279, 17267992, 12732160, 65708167, 48440175, 249956105, 184247938, 950654341, 700698236, 3615152086, 2664497745, 13746596563, 10131444477]

cp's OEIS Frontend

A215139 a(n) = (a(n-1) - a(n-3))*7^((1+(-1)^n)/2) with a(6)=5, a(7)=4, a(8)=22.

Table of values

List of values