A256285 - cp's OEIS frontend

A256285 a(n) = smallest divisor of the concatenation of n+1 and n, that did not occur earlier.

n	a(n)
1	1
2	2
3	43
4	3
5	5
6	4
7	29
8	7
9	109
10	6
11	173
12	8
13	9
14	757
15	17
16	11
17	23
18	14
19	673
20	10
21	2221
22	18
23	2423
24	631
25	15
26	47
27	257
28	12
29	13
30	313
31	359
32	28
33	3433
34	19
35	727
36	467
37	1279
38	22
39	577
40	20
41	4241
42	26
43	1481
44	16
45	929
46	21
47	37
48	1237
49	27
50	25
51	59
52	24
53	41
54	2777
55	39
56	1439
57	5857
58	331
59	73

[1, 2, 43, 3, 5, 4, 29, 7, 109, 6, 173, 8, 9, 757, 17, 11, 23, 14, 673, 10, 2221, 18, 2423, 631, 15, 47, 257, 12, 13, 313, 359, 28, 3433, 19, 727, 467, 1279, 22, 577, 20, 4241, 26, 1481, 16, 929, 21, 37, 1237, 27, 25, 59, 24, 41, 2777, 39, 1439, 5857, 331, 73]

cp's OEIS Frontend

A256285 a(n) = smallest divisor of the concatenation of n+1 and n, that did not occur earlier.

Table of values

List of values