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.

A080385 Numbers k such that there are exactly 7 numbers j for which binomial(k, floor(k/2)) / binomial(k,j) is an integer, i.e., A080383(k) = 7.

Table of values

n a(n)
1 12
2 30
3 56
4 84
5 90
6 132
7 154
8 182
9 220
10 252
11 280
12 306
13 312
14 340
15 374
16 380
17 408
18 418
19 440
20 456
21 462
22 476
23 532
24 552
25 598
26 616
27 624
28 630
29 644
30 650
31 660
32 690
33 756
34 828
35 840
36 858
37 870
38 880
39 884
40 900
41 918
42 936
43 952
44 966
45 986
46 992
47 1020
48 1054
49 1102
50 1116
51 1140
52 1160

List of values

[12, 30, 56, 84, 90, 132, 154, 182, 220, 252, 280, 306, 312, 340, 374, 380, 408, 418, 440, 456, 462, 476, 532, 552, 598, 616, 624, 630, 644, 650, 660, 690, 756, 828, 840, 858, 870, 880, 884, 900, 918, 936, 952, 966, 986, 992, 1020, 1054, 1102, 1116, 1140, 1160]