A051454 - cp's OEIS frontend

A051454 a(n) is the smallest prime factor of 1 + lcm(1..k) where k is the n-th prime power A000961(n).

n	a(n)
1	2
2	3
3	7
4	13
5	61
6	421
7	29
8	2521
9	19
10	89
11	71
12	1693
13	232792561
14	6659
15	26771144401
16	331
17	101
18	72201776446801
19	1801
20	173
21	54941
22	89
23	442720643463713815201
24	593
25	5171
26	239
27	1222615931
28	103
29	7265496855919
30	6562349363
31	4447
32	147099357127
33	1931

[2, 3, 7, 13, 61, 421, 29, 2521, 19, 89, 71, 1693, 232792561, 6659, 26771144401, 331, 101, 72201776446801, 1801, 173, 54941, 89, 442720643463713815201, 593, 5171, 239, 1222615931, 103, 7265496855919, 6562349363, 4447, 147099357127, 1931]

cp's OEIS Frontend

A051454 a(n) is the smallest prime factor of 1 + lcm(1..k) where k is the n-th prime power A000961(n).

Table of values

List of values