A217787 - cp's OEIS frontend

A217787 a(n) = (a(n-1)*a(n-3) + 1) / a(n-4) with a(0) = a(1) = a(2) = a(3) = 1.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	3
6	4
7	9
8	14
9	19
10	43
11	67
12	91
13	206
14	321
15	436
16	987
17	1538
18	2089
19	4729
20	7369
21	10009
22	22658
23	35307
24	47956
25	108561
26	169166
27	229771
28	520147
29	810523
30	1100899
31	2492174
32	3883449
33	5274724
34	11940723
35	18606722
36	25272721
37	57211441
38	89150161
39	121088881

[1, 1, 1, 1, 2, 3, 4, 9, 14, 19, 43, 67, 91, 206, 321, 436, 987, 1538, 2089, 4729, 7369, 10009, 22658, 35307, 47956, 108561, 169166, 229771, 520147, 810523, 1100899, 2492174, 3883449, 5274724, 11940723, 18606722, 25272721, 57211441, 89150161, 121088881]

cp's OEIS Frontend

A217787 a(n) = (a(n-1)*a(n-3) + 1) / a(n-4) with a(0) = a(1) = a(2) = a(3) = 1.

Table of values

List of values