A242171 - cp's OEIS frontend

A242171 Least prime divisor of B(n) which does not divide any B(k) with k < n, or 1 if such a primitive prime divisor of B(n) does not exist, where B(n) is the n-th Bell number given by A000110.

n	a(n)
1	1
2	2
3	5
4	3
5	13
6	7
7	877
8	23
9	19
10	4639
11	22619
12	37
13	27644437
14	1800937
15	251
16	241
17	255755771
18	19463
19	271
20	61
21	24709
22	17
23	89
24	123419
25	367
26	101
27	157
28	67
29	75979
30	107
31	11
32	179167
33	5694673
34	111509
35	980424262253
36	193
37	44101
38	5399
39	6353
40	3221

[1, 2, 5, 3, 13, 7, 877, 23, 19, 4639, 22619, 37, 27644437, 1800937, 251, 241, 255755771, 19463, 271, 61, 24709, 17, 89, 123419, 367, 101, 157, 67, 75979, 107, 11, 179167, 5694673, 111509, 980424262253, 193, 44101, 5399, 6353, 3221]

cp's OEIS Frontend

A242171 Least prime divisor of B(n) which does not divide any B(k) with k < n, or 1 if such a primitive prime divisor of B(n) does not exist, where B(n) is the n-th Bell number given by A000110.

Table of values

List of values