A241811 - cp's OEIS frontend

A241811 a(1) = 1, a(2) = 0; for n >= 3, a(n) = least number not included earlier that divides the concatenation of all previous terms.

n	a(n)
1	1
2	0
3	2
4	3
5	11
6	71
7	29
8	9
9	683
10	67
11	7
12	743
13	739
14	1933
15	23
16	161
17	21
18	37
19	19
20	17
21	119
22	49
23	332534262883
24	13
25	39
26	13739483941387
27	83
28	111
29	79853560395691
30	5431567
31	70610371
32	69
33	51
34	4112497
35	28384496881337963
36	353
37	77
38	1531
39	42787
40	63
41	27
42	41
43	709
44	33
45	81
46	487
47	139697

[1, 0, 2, 3, 11, 71, 29, 9, 683, 67, 7, 743, 739, 1933, 23, 161, 21, 37, 19, 17, 119, 49, 332534262883, 13, 39, 13739483941387, 83, 111, 79853560395691, 5431567, 70610371, 69, 51, 4112497, 28384496881337963, 353, 77, 1531, 42787, 63, 27, 41, 709, 33, 81, 487, 139697]

cp's OEIS Frontend

A241811 a(1) = 1, a(2) = 0; for n >= 3, a(n) = least number not included earlier that divides the concatenation of all previous terms.

Table of values

List of values