A135692 - cp's OEIS frontend

A135692 a(n) = a(n-2) - 2( a(floor(n/2)) - a(abs(floor(n/2) - 1)) ) if (n mod 2) = 0, otherwise a(n-1) - 2( a(abs(floor(n/2) - 2)) - a(abs(floor(n/2) - 3)) ), with a(0) = 0, a(1) = 1, a(2) = -2, a(3) = -4.

n	a(n)
0	0
1	1
2	-2
3	-4
4	4
5	6
6	8
7	6
8	-8
9	-2
10	-12
11	-8
12	-16
13	-32
14	-12
15	-16
16	16
17	12
18	4
19	8
20	24
21	52
22	16
23	4
24	32
25	52
26	64
27	56
28	24
29	40
30	32
31	64
32	-32
33	-72
34	-24
35	-16
36	-8
37	-72
38	-16
39	-8
40	-48
41	-32
42	-104
43	-112
44	-32
45	-64
46	-8
47	-64
48	-64
49	8
50	-104
51	-80
52	-128
53	-184
54	-112
55	-152
56	-48
57	-72
58	-80
59	-64
60	-64
61	0
62	-128
63	-160
64	64
65	80
66	144
67	80
68	48
69	240
70	32
71	112
72	16
73	-80

[0, 1, -2, -4, 4, 6, 8, 6, -8, -2, -12, -8, -16, -32, -12, -16, 16, 12, 4, 8, 24, 52, 16, 4, 32, 52, 64, 56, 24, 40, 32, 64, -32, -72, -24, -16, -8, -72, -16, -8, -48, -32, -104, -112, -32, -64, -8, -64, -64, 8, -104, -80, -128, -184, -112, -152, -48, -72, -80, -64, -64, 0, -128, -160, 64, 80, 144, 80, 48, 240, 32, 112, 16, -80]

cp's OEIS Frontend

A135692 a(n) = a(n-2) - 2( a(floor(n/2)) - a(abs(floor(n/2) - 1)) ) if (n mod 2) = 0, otherwise a(n-1) - 2( a(abs(floor(n/2) - 2)) - a(abs(floor(n/2) - 3)) ), with a(0) = 0, a(1) = 1, a(2) = -2, a(3) = -4.

Table of values

List of values

cp's OEIS Frontend

A135692 a(n) = a(n-2) - 2*( a(floor(n/2)) - a(abs(floor(n/2) - 1)) ) if (n mod 2) = 0, otherwise a(n-1) - 2*( a(abs(floor(n/2) - 2)) - a(abs(floor(n/2) - 3)) ), with a(0) = 0, a(1) = 1, a(2) = -2, a(3) = -4.

Table of values

List of values

A135692 a(n) = a(n-2) - 2( a(floor(n/2)) - a(abs(floor(n/2) - 1)) ) if (n mod 2) = 0, otherwise a(n-1) - 2( a(abs(floor(n/2) - 2)) - a(abs(floor(n/2) - 3)) ), with a(0) = 0, a(1) = 1, a(2) = -2, a(3) = -4.