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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.

A075408 Perfect powers pp such that pp+1 is prime.

Table of values

n a(n)
1 1
2 4
3 16
4 36
5 100
6 196
7 256
8 400
9 576
10 676
11 1296
12 1600
13 2916
14 3136
15 4356
16 5476
17 7056
18 8100
19 8836
20 12100
21 13456
22 14400
23 15376
24 15876
25 16900
26 17956
27 21316
28 22500
29 24336
30 25600
31 28900
32 30976
33 32400
34 33856
35 41616
36 42436
37 44100
38 50176
39 52900
40 55696

List of values

[1, 4, 16, 36, 100, 196, 256, 400, 576, 676, 1296, 1600, 2916, 3136, 4356, 5476, 7056, 8100, 8836, 12100, 13456, 14400, 15376, 15876, 16900, 17956, 21316, 22500, 24336, 25600, 28900, 30976, 32400, 33856, 41616, 42436, 44100, 50176, 52900, 55696]

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

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