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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.

A074973 Smallest index i such that next_prime( 2*prime(i) ) - 2*prime(i) = 2n - 1.

Table of values

n a(n)
1 1
2 4
3 11
4 20
5 17
6 67
7 104
8 56
9 125
10 165
11 182
12 316
13 236
14 359
15 407
16 1254
17 667
18 836
19 1521
20 1210
21 1966
22 3197
23 1520
24 2294
25 2279
26 2046
27 5410
28 5472
29 1965
30 6702
31 13947
32 10138
33 12122
34 16760
35 7659
36 22325
37 16784
38 13072
39 36169
40 17852
41 15414
42 69872
43 23814
44 16370
45 46752

List of values

[1, 4, 11, 20, 17, 67, 104, 56, 125, 165, 182, 316, 236, 359, 407, 1254, 667, 836, 1521, 1210, 1966, 3197, 1520, 2294, 2279, 2046, 5410, 5472, 1965, 6702, 13947, 10138, 12122, 16760, 7659, 22325, 16784, 13072, 36169, 17852, 15414, 69872, 23814, 16370, 46752]

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

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