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.

A081863 Largest integer m such that m divides (sigma_(2n+1)(2k-1)-sigma(2k-1)) for all k>=1.

Table of values

n a(n)
1 24
2 240
3 168
4 480
5 264
6 21840
7 24
8 16320
9 3192
10 2640
11 552
12 43680
13 24
14 6960
15 57288
16 32640
17 24
18 15353520
19 24
20 216480
21 7224
22 5520
23 1128
24 1485120
25 264
26 12720
27 3192
28 13920
29 1416
30 454293840
31 24
32 65280
33 258888
34 240
35 18744
36 2241613920
37 24
38 240
39 13272
40 7360320
41 1992

List of values

[24, 240, 168, 480, 264, 21840, 24, 16320, 3192, 2640, 552, 43680, 24, 6960, 57288, 32640, 24, 15353520, 24, 216480, 7224, 5520, 1128, 1485120, 264, 12720, 3192, 13920, 1416, 454293840, 24, 65280, 258888, 240, 18744, 2241613920, 24, 240, 13272, 7360320, 1992]

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

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