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.

A025144 Numbers k such that (#1's in s(1),...,s(k)) = (#1's in r(1),...,r(k)), where s = A025142 and r = A025143.

Table of values

n a(n)
1 18
2 19
3 20
4 24
5 25
6 26
7 28
8 30
9 33
10 34
11 35
12 37
13 39
14 42
15 45
16 51
17 53
18 54
19 56
20 57
21 59
22 60
23 63
24 71
25 72
26 73
27 74
28 75
29 77
30 78
31 80
32 83
33 90
34 98
35 99
36 100
37 101
38 102
39 108
40 110
41 117
42 120
43 289
44 305
45 308
46 382
47 383
48 385
49 386
50 387
51 388
52 389
53 390
54 391
55 392
56 394
57 395
58 398
59 405
60 406
61 407
62 408
63 409
64 410

List of values

[18, 19, 20, 24, 25, 26, 28, 30, 33, 34, 35, 37, 39, 42, 45, 51, 53, 54, 56, 57, 59, 60, 63, 71, 72, 73, 74, 75, 77, 78, 80, 83, 90, 98, 99, 100, 101, 102, 108, 110, 117, 120, 289, 305, 308, 382, 383, 385, 386, 387, 388, 389, 390, 391, 392, 394, 395, 398, 405, 406, 407, 408, 409, 410]

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

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