A112861 - cp's OEIS frontend

A112861 Numbers k such that (2k)!/(2(k!)^2) - 1 is prime.

n	a(n)
1	2
2	6
3	10
4	21
5	45
6	63
7	306
8	404
9	437
10	471
11	646
12	1174
13	1192
14	1334
15	1975
16	2397
17	2410
18	4305
19	6111
20	7852
21	9488
22	11120
23	13304
24	14408
25	16075
26	16238
27	21188
28	21659
29	22025
30	28673
31	30793
32	32178
33	35278
34	40049
35	46516
36	47836
37	52157
38	54531
39	59897
40	60275
41	63362
42	76139
43	84219
44	89024
45	90783
46	91605
47	96761

[2, 6, 10, 21, 45, 63, 306, 404, 437, 471, 646, 1174, 1192, 1334, 1975, 2397, 2410, 4305, 6111, 7852, 9488, 11120, 13304, 14408, 16075, 16238, 21188, 21659, 22025, 28673, 30793, 32178, 35278, 40049, 46516, 47836, 52157, 54531, 59897, 60275, 63362, 76139, 84219, 89024, 90783, 91605, 96761]

cp's OEIS Frontend

A112861 Numbers k such that (2k)!/(2(k!)^2) - 1 is prime.

Table of values

List of values

cp's OEIS Frontend

A112861 Numbers k such that (2*k)!/(2*(k!)^2) - 1 is prime.

Table of values

List of values

A112861 Numbers k such that (2k)!/(2(k!)^2) - 1 is prime.