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.

A078971 Numbers n such that C(4n,n)/(3n+1) (A002293) is not divisible by 4.

Table of values

n a(n)
1 0
2 1
3 3
4 5
5 11
6 13
7 21
8 43
9 45
10 53
11 85
12 171
13 173
14 181
15 213
16 341
17 683
18 685
19 693
20 725
21 853
22 1365
23 2731
24 2733
25 2741
26 2773
27 2901
28 3413
29 5461
30 10923
31 10925
32 10933
33 10965
34 11093
35 11605
36 13653
37 21845
38 43691
39 43693
40 43701
41 43733
42 43861
43 44373
44 46421
45 54613

List of values

[0, 1, 3, 5, 11, 13, 21, 43, 45, 53, 85, 171, 173, 181, 213, 341, 683, 685, 693, 725, 853, 1365, 2731, 2733, 2741, 2773, 2901, 3413, 5461, 10923, 10925, 10933, 10965, 11093, 11605, 13653, 21845, 43691, 43693, 43701, 43733, 43861, 44373, 46421, 54613]

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

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