A226940 - cp's OEIS frontend

A226940 a(0)=0; if a(n-1) is odd, a(n) = n + a(n-1), otherwise a(n) = n - a(n-1).

n	a(n)
0	0
1	1
2	3
3	6
4	-2
5	7
6	13
7	20
8	-12
9	21
10	31
11	42
12	-30
13	43
14	57
15	72
16	-56
17	73
18	91
19	110
20	-90
21	111
22	133
23	156
24	-132
25	157
26	183
27	210
28	-182
29	211
30	241
31	272
32	-240
33	273
34	307
35	342
36	-306
37	343
38	381
39	420
40	-380
41	421
42	463
43	506
44	-462
45	507
46	553
47	600
48	-552
49	601
50	651
51	702
52	-650
53	703
54	757

[0, 1, 3, 6, -2, 7, 13, 20, -12, 21, 31, 42, -30, 43, 57, 72, -56, 73, 91, 110, -90, 111, 133, 156, -132, 157, 183, 210, -182, 211, 241, 272, -240, 273, 307, 342, -306, 343, 381, 420, -380, 421, 463, 506, -462, 507, 553, 600, -552, 601, 651, 702, -650, 703, 757]

cp's OEIS Frontend

A226940 a(0)=0; if a(n-1) is odd, a(n) = n + a(n-1), otherwise a(n) = n - a(n-1).

Table of values

List of values