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.

A340643 Numbers k such that the two perfect powers immediately adjacent to k^2 both have exponents greater than 2.

Table of values

n a(n)
1 2
2 3
3 5
4 15
5 26
6 46
7 82
8 89
9 90
10 129
11 323
12 362
13 401
14 420
15 610
16 624
17 840
18 2024
19 2703
20 2808
21 6888
22 12099
23 15963
24 19320
25 24650
26 29930
27 33490
28 36482
29 39203
30 45795
31 47523
32 52440
33 66050
34 69168
35 83408
36 94248
37 94863
38 103683
39 114284
40 164399
41 185364
42 206442
43 222785
44 227530
45 229180

List of values

[2, 3, 5, 15, 26, 46, 82, 89, 90, 129, 323, 362, 401, 420, 610, 624, 840, 2024, 2703, 2808, 6888, 12099, 15963, 19320, 24650, 29930, 33490, 36482, 39203, 45795, 47523, 52440, 66050, 69168, 83408, 94248, 94863, 103683, 114284, 164399, 185364, 206442, 222785, 227530, 229180]

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

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