A217393 - cp's OEIS frontend

A217393 Smallest k > 0 such that 1 + n^2 and 1 + (n+k)^2 have the same largest factor, or 0 if no such k exists.

n	a(n)
1	0
2	1
3	4
4	9
5	3
6	25
7	0
8	10
9	23
10	81
11	39
12	5
13	8
14	169
15	83
16	225
17	24
18	39
19	143
20	361
21	17
22	53
23	7
24	529
25	263
26	625
27	19
28	101
29	363
30	53
31	12
32	41
33	43
34	21
35	543
36	1225
37	63
38	9
39	683
40	1521
41	29
42	269
43	25
44	61
45	923
46	127
47	221
48	365
49	1103
50	22
51	1199
52	437
53	175
54	2809
55	68
56	3025
57	182
58	557
59	1623
60	157

[0, 1, 4, 9, 3, 25, 0, 10, 23, 81, 39, 5, 8, 169, 83, 225, 24, 39, 143, 361, 17, 53, 7, 529, 263, 625, 19, 101, 363, 53, 12, 41, 43, 21, 543, 1225, 63, 9, 683, 1521, 29, 269, 25, 61, 923, 127, 221, 365, 1103, 22, 1199, 437, 175, 2809, 68, 3025, 182, 557, 1623, 157]

cp's OEIS Frontend

A217393 Smallest k > 0 such that 1 + n^2 and 1 + (n+k)^2 have the same largest factor, or 0 if no such k exists.

Table of values

List of values