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.

A080170 Numbers k such that gcd(C(2*k,k), C(3*k,k), C(4*k,k), ..., C((k+1)*k,k) ) = 1.

Table of values

n a(n)
1 29
2 59
3 69
4 83
5 89
6 104
7 119
8 125
9 131
10 139
11 153
12 164
13 167
14 179
15 181
16 194
17 197
18 209
19 219
20 230
21 233
22 251
23 259
24 263
25 272
26 279
27 285
28 305
29 307
30 311
31 314
32 329
33 335
34 339
35 356
36 359
37 363
38 373
39 379
40 384
41 389
42 395
43 398
44 407
45 417
46 419
47 428
48 439
49 441
50 454
51 455
52 461

List of values

[29, 59, 69, 83, 89, 104, 119, 125, 131, 139, 153, 164, 167, 179, 181, 194, 197, 209, 219, 230, 233, 251, 259, 263, 272, 279, 285, 305, 307, 311, 314, 329, 335, 339, 356, 359, 363, 373, 379, 384, 389, 395, 398, 407, 417, 419, 428, 439, 441, 454, 455, 461]

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

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