A247369 - cp's OEIS frontend

A247369 a(n) = (a(n-1) * a(n-3) + (-1)^n * a(n-2)^2) / a(n-4), with a(0) = 0, a(1) = -1, a(2) = a(3) = a(4) = 1, a(9) = 3.

n	a(n)
0	0
1	-1
2	1
3	1
4	1
5	0
6	1
7	1
8	1
9	3
10	4
11	-5
12	1
13	-7
14	9
15	8
16	25
17	-23
18	49
19	87
20	16
21	295
22	529
23	-903
24	841
25	-1256
26	3481
27	-1495
28	16641
29	-44341
30	98596
31	217651
32	4225
33	1058961
34	2337841
35	-5106896
36	13608721
37	5415345
38	67387681
39	-173830481
40	264517696
41	-2288275633
42	6941055969

[0, -1, 1, 1, 1, 0, 1, 1, 1, 3, 4, -5, 1, -7, 9, 8, 25, -23, 49, 87, 16, 295, 529, -903, 841, -1256, 3481, -1495, 16641, -44341, 98596, 217651, 4225, 1058961, 2337841, -5106896, 13608721, 5415345, 67387681, -173830481, 264517696, -2288275633, 6941055969]

cp's OEIS Frontend

A247369 a(n) = (a(n-1) * a(n-3) + (-1)^n * a(n-2)^2) / a(n-4), with a(0) = 0, a(1) = -1, a(2) = a(3) = a(4) = 1, a(9) = 3.

Table of values

List of values