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.

A067778 Numbers k such that gcd(k, numerator(B(2*k))) is not squarefree where B(2*k) are the Bernoulli numbers.

Table of values

n a(n)
1 25
2 49
3 75
4 98
5 121
6 125
7 169
8 175
9 196
10 225
11 242
12 245
13 275
14 289
15 325
16 338
17 343
18 361
19 363
20 375
21 392
22 425
23 475
24 484
25 490
26 507
27 525
28 529
29 539
30 575
31 578
32 625
33 637
34 675
35 676
36 686
37 722
38 725
39 726
40 775
41 784
42 825
43 833
44 841
45 845
46 847
47 867
48 875
49 925
50 931
51 961
52 968

List of values

[25, 49, 75, 98, 121, 125, 169, 175, 196, 225, 242, 245, 275, 289, 325, 338, 343, 361, 363, 375, 392, 425, 475, 484, 490, 507, 525, 529, 539, 575, 578, 625, 637, 675, 676, 686, 722, 725, 726, 775, 784, 825, 833, 841, 845, 847, 867, 875, 925, 931, 961, 968]

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

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