A085946 - cp's OEIS frontend

A085946 a(1) = 1, a(2) = 2 and a(n) = smallest number not included earlier that divides the concatenation a(n-2), a(n-1).

n	a(n)
1	1
2	2
3	3
4	23
5	17
6	7
7	59
8	11
9	257
10	11257
11	13
12	1125713
13	43708571
14	19
15	9
16	199
17	9199
18	43
19	487
20	43487
21	39
22	228881
23	811
24	1973
25	41
26	197341
27	51
28	379
29	191
30	126397
31	21
32	731
33	31
34	57
35	77
36	53
37	7753
38	79
39	70489
40	346543
41	121
42	346543121
43	47
44	37
45	1579
46	101
47	526367
48	5343493

[1, 2, 3, 23, 17, 7, 59, 11, 257, 11257, 13, 1125713, 43708571, 19, 9, 199, 9199, 43, 487, 43487, 39, 228881, 811, 1973, 41, 197341, 51, 379, 191, 126397, 21, 731, 31, 57, 77, 53, 7753, 79, 70489, 346543, 121, 346543121, 47, 37, 1579, 101, 526367, 5343493]

cp's OEIS Frontend

A085946 a(1) = 1, a(2) = 2 and a(n) = smallest number not included earlier that divides the concatenation a(n-2), a(n-1).

Table of values

List of values