A261411 - cp's OEIS frontend

A261411 a(1)=1; thereafter a(n) = smallest prime factor of A261570(n).

n	a(n)
1	1
2	11
3	3
4	11
5	41
6	3
7	239
8	11
9	3
10	11
11	11
12	3
13	11
14	11
15	3
16	11
17	11
18	3
19	71
20	21557
21	19
22	17
23	31
24	181
25	17
26	353
27	19
28	31
29	19
30	29
31	17
32	29
33	11616377
34	214141
35	19
36	5471
37	17
38	13883
39	3
40	7
41	421219193
42	3
43	17
44	7
45	3
46	7
47	101
48	3
49	634324033999
50	13
51	19
52	13
53	83
54	13
55	23
56	13
57	19
58	13
59	19

[1, 11, 3, 11, 41, 3, 239, 11, 3, 11, 11, 3, 11, 11, 3, 11, 11, 3, 71, 21557, 19, 17, 31, 181, 17, 353, 19, 31, 19, 29, 17, 29, 11616377, 214141, 19, 5471, 17, 13883, 3, 7, 421219193, 3, 17, 7, 3, 7, 101, 3, 634324033999, 13, 19, 13, 83, 13, 23, 13, 19, 13, 19]

cp's OEIS Frontend

A261411 a(1)=1; thereafter a(n) = smallest prime factor of A261570(n).

Table of values

List of values