A177941 - cp's OEIS frontend

A177941 a(1)=5; for n>0, a(n+1)=a(n)+p-1, where p is the smallest prime divisor of (a(n))^2-4.

n	a(n)
1	5
2	7
3	9
4	15
5	27
6	31
7	33
8	37
9	39
10	75
11	81
12	159
13	165
14	327
15	331
16	333
17	337
18	339
19	349
20	351
21	699
22	715
23	717
24	721
25	723
26	727
27	729
28	745
29	747
30	751
31	753
32	757
33	759
34	1515
35	1531
36	1533
37	1537
38	1539
39	1561
40	1563
41	1567
42	1569
43	3135
44	3147
45	3151
46	3153
47	3157
48	3159
49	3165
50	6327
51	6331
52	6333
53	6337

[5, 7, 9, 15, 27, 31, 33, 37, 39, 75, 81, 159, 165, 327, 331, 333, 337, 339, 349, 351, 699, 715, 717, 721, 723, 727, 729, 745, 747, 751, 753, 757, 759, 1515, 1531, 1533, 1537, 1539, 1561, 1563, 1567, 1569, 3135, 3147, 3151, 3153, 3157, 3159, 3165, 6327, 6331, 6333, 6337]

cp's OEIS Frontend

A177941 a(1)=5; for n>0, a(n+1)=a(n)+p-1, where p is the smallest prime divisor of (a(n))^2-4.

Table of values

List of values