A355141 - cp's OEIS frontend

A355141 a(0)=1, a(1)=a(2)=0; for n > 2, a(n) = a(n-1) + s if n is odd, a(n-1) - s if n is even, where s = a(n-1) + a(n-2) + a(n-3).

n	a(n)
0	1
1	0
2	0
3	1
4	0
5	1
6	-1
7	-1
8	0
9	-2
10	1
11	0
12	1
13	3
14	-1
15	2
16	-2
17	-3
18	0
19	-5
20	3
21	1
22	2
23	8
24	-3
25	4
26	-5
27	-9
28	1
29	-12
30	8
31	5
32	4
33	21
34	-9
35	7
36	-12
37	-26
38	5
39	-28
40	21
41	19
42	7
43	54
44	-26
45	9
46	-28
47	-73
48	19
49	-63
50	54
51	64
52	9
53	136
54	-73
55	-1
56	-63
57	-200
58	64
59	-135
60	136
61	201
62	-1
63	335
64	-200
65	-66

[1, 0, 0, 1, 0, 1, -1, -1, 0, -2, 1, 0, 1, 3, -1, 2, -2, -3, 0, -5, 3, 1, 2, 8, -3, 4, -5, -9, 1, -12, 8, 5, 4, 21, -9, 7, -12, -26, 5, -28, 21, 19, 7, 54, -26, 9, -28, -73, 19, -63, 54, 64, 9, 136, -73, -1, -63, -200, 64, -135, 136, 201, -1, 335, -200, -66]

cp's OEIS Frontend

A355141 a(0)=1, a(1)=a(2)=0; for n > 2, a(n) = a(n-1) + s if n is odd, a(n-1) - s if n is even, where s = a(n-1) + a(n-2) + a(n-3).

Table of values

List of values