A242174 - cp's OEIS frontend

A242174 Least prime divisor of A005260(n) which does not divide any previous term A005260(k) with k < n, or 1 if such a primitive prime divisor of A005260(n) does not exist.

n	a(n)
1	2
2	3
3	41
4	5
5	7
6	349
7	61
8	75617
9	31
10	13
11	499
12	643897693
13	17
14	19
15	1729774061
16	101
17	2859112064587
18	138407
19	83
20	167
21	59
22	29
23	653
24	257
25	997540809461453561581
26	347
27	13679
28	37
29	160449179727717672892660463
30	211
31	151
32	43
33	97
34	73
35	47

[2, 3, 41, 5, 7, 349, 61, 75617, 31, 13, 499, 643897693, 17, 19, 1729774061, 101, 2859112064587, 138407, 83, 167, 59, 29, 653, 257, 997540809461453561581, 347, 13679, 37, 160449179727717672892660463, 211, 151, 43, 97, 73, 47]

cp's OEIS Frontend

A242174 Least prime divisor of A005260(n) which does not divide any previous term A005260(k) with k < n, or 1 if such a primitive prime divisor of A005260(n) does not exist.

Table of values

List of values