A219634 - cp's OEIS frontend

A219634 a(n) is the smallest number > a(n-1) such that 1 + a(1)^2 + a(2)^2 + ... + a(n)^2 is a prime.

n	a(n)
1	1
2	3
3	6
4	12
5	30
6	54
7	60
8	72
9	120
10	126
11	144
12	174
13	198
14	210
15	294
16	300
17	318
18	354
19	408
20	420
21	426
22	432
23	480
24	498
25	522
26	564
27	588
28	594
29	600
30	624
31	630
32	648
33	666
34	714
35	720
36	852
37	864
38	978
39	1002
40	1050
41	1056
42	1080
43	1098
44	1122
45	1146
46	1152
47	1170
48	1176
49	1200
50	1206
51	1458

[1, 3, 6, 12, 30, 54, 60, 72, 120, 126, 144, 174, 198, 210, 294, 300, 318, 354, 408, 420, 426, 432, 480, 498, 522, 564, 588, 594, 600, 624, 630, 648, 666, 714, 720, 852, 864, 978, 1002, 1050, 1056, 1080, 1098, 1122, 1146, 1152, 1170, 1176, 1200, 1206, 1458]

cp's OEIS Frontend

A219634 a(n) is the smallest number > a(n-1) such that 1 + a(1)^2 + a(2)^2 + ... + a(n)^2 is a prime.

Table of values

List of values