cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A066726 Numbers n such that binomial(2n, n) - 1 is prime.

Table of values

n a(n)
1 2
2 3
3 5
4 9
5 15
6 29
7 43
8 51
9 113
10 184
11 213
12 222
13 267
14 279
15 369
16 402
17 441
18 603
19 812
20 839
21 902
22 1422
23 1542
24 1824
25 2983
26 3065
27 3911
28 3958
29 4192
30 4587
31 4865
32 5543
33 5837
34 7902
35 9299
36 9722
37 10412
38 10648
39 11498
40 12803
41 14428
42 15876
43 20173
44 26311
45 38927
46 52210
47 54189
48 59757
49 60454
50 72094
51 76899
52 85033
53 91059
54 91059

List of values

[2, 3, 5, 9, 15, 29, 43, 51, 113, 184, 213, 222, 267, 279, 369, 402, 441, 603, 812, 839, 902, 1422, 1542, 1824, 2983, 3065, 3911, 3958, 4192, 4587, 4865, 5543, 5837, 7902, 9299, 9722, 10412, 10648, 11498, 12803, 14428, 15876, 20173, 26311, 38927, 52210, 54189, 59757, 60454, 72094, 76899, 85033, 91059, 91059]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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