A356255 - cp's OEIS frontend

A356255 a(1) = 1; for n > 1, a(n) is the smallest magnitude number not occurring earlier such that n is divisible by s = Sum_{k = 1..n} a(k), where |s| > 1.

n	a(n)
1	1
2	-3
3	-1
4	5
5	3
6	-2
7	4
8	-5
9	7
10	-4
11	6
12	-7
13	9
14	-6
15	8
16	-11
17	13
18	-8
19	10
20	-9
21	11
22	-10
23	12
24	-15
25	-13
26	18
27	14
28	-20
29	22
30	-14
31	16
32	-23
33	-19
34	28
35	-12
36	-17
37	-25
38	35
39	15
40	-18
41	-36
42	20
43	-22
44	21
45	17
46	-41
47	93
48	-31
49	33
50	-24
51	26
52	-38
53	40
54	-26
55	-16
56	-39
57	25
58	32
59	30
60	-29
61	31
62	-30
63	-28
64	29
65	-27
66	61
67	-133
68	50
69	-52
70	34

[1, -3, -1, 5, 3, -2, 4, -5, 7, -4, 6, -7, 9, -6, 8, -11, 13, -8, 10, -9, 11, -10, 12, -15, -13, 18, 14, -20, 22, -14, 16, -23, -19, 28, -12, -17, -25, 35, 15, -18, -36, 20, -22, 21, 17, -41, 93, -31, 33, -24, 26, -38, 40, -26, -16, -39, 25, 32, 30, -29, 31, -30, -28, 29, -27, 61, -133, 50, -52, 34]

cp's OEIS Frontend

A356255 a(1) = 1; for n > 1, a(n) is the smallest magnitude number not occurring earlier such that n is divisible by s = Sum_{k = 1..n} a(k), where |s| > 1.

Table of values

List of values