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.

A076440 Numbers k which appear to have a unique representation as the difference of two perfect powers where one of those powers is odd; that is, there is only one solution to Pillai's equation a^x - b^y = k, with a > 0, b > 0, x > 1, y > 1 and that solution has odd x or odd y (or both odd).

Table of values

n a(n)
1 1
2 2
3 10
4 30
5 38
6 46
7 122
8 126
9 138
10 142
11 146
12 150
13 154
14 166
15 170
16 190
17 194
18 214
19 222
20 234
21 270
22 282
23 298
24 318
25 338
26 342
27 354
28 370
29 382
30 386
31 406
32 486
33 490
34 498
35 502
36 518
37 546
38 550
39 566
40 574
41 582
42 586
43 594
44 638
45 666
46 678
47 686
48 694
49 710
50 726
51 730
52 734
53 746

List of values

[1, 2, 10, 30, 38, 46, 122, 126, 138, 142, 146, 150, 154, 166, 170, 190, 194, 214, 222, 234, 270, 282, 298, 318, 338, 342, 354, 370, 382, 386, 406, 486, 490, 498, 502, 518, 546, 550, 566, 574, 582, 586, 594, 638, 666, 678, 686, 694, 710, 726, 730, 734, 746]

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

Content is available under The OEIS End-User License Agreement.