A242194 - cp's OEIS frontend

A242194 Least prime divisor of E_{2n} which does not divide any E_{2k} with k < n, or 1 if such a primitive prime divisor of E_{2*n} does not exist, where E_m denotes the m-th Euler number given by A122045.

n	a(n)
1	1
2	5
3	61
4	277
5	19
6	13
7	47
8	17
9	79
10	41737
11	31
12	2137
13	67
14	29
15	15669721
16	930157
17	4153
18	37
19	23489580527043108252017828576198947741
20	41
21	137
22	587
23	285528427091
24	5516994249383296071214195242422482492286460673697
25	5639
26	53
27	2749
28	5303
29	1459879476771247347961031445001033
30	6821509

[1, 5, 61, 277, 19, 13, 47, 17, 79, 41737, 31, 2137, 67, 29, 15669721, 930157, 4153, 37, 23489580527043108252017828576198947741, 41, 137, 587, 285528427091, 5516994249383296071214195242422482492286460673697, 5639, 53, 2749, 5303, 1459879476771247347961031445001033, 6821509]

cp's OEIS Frontend

A242194 Least prime divisor of E_{2n} which does not divide any E_{2k} with k < n, or 1 if such a primitive prime divisor of E_{2*n} does not exist, where E_m denotes the m-th Euler number given by A122045.

Table of values

List of values

cp's OEIS Frontend

A242194 Least prime divisor of E_{2*n} which does not divide any E_{2*k} with k < n, or 1 if such a primitive prime divisor of E_{2*n} does not exist, where E_m denotes the m-th Euler number given by A122045.

Table of values

List of values

A242194 Least prime divisor of E_{2n} which does not divide any E_{2k} with k < n, or 1 if such a primitive prime divisor of E_{2*n} does not exist, where E_m denotes the m-th Euler number given by A122045.