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.

A346936 a(n) = Sum_{d|n} mu(n/d) * binomial(5*d,d) / (4*d+1).

Table of values

n a(n)
1 1
2 4
3 34
4 280
5 2529
6 23712
7 231879
8 2330160
9 23950320
10 250540836
11 2658968129
12 28558319744
13 309831575759
14 3390416555996
15 37377257156716
16 414741861215840
17 4628362722856424
18 51912988232308104
19 584909606696793884
20 6617078646710069720
21 75134301594081157746
22 855968478539048248916

List of values

[1, 4, 34, 280, 2529, 23712, 231879, 2330160, 23950320, 250540836, 2658968129, 28558319744, 309831575759, 3390416555996, 37377257156716, 414741861215840, 4628362722856424, 51912988232308104, 584909606696793884, 6617078646710069720, 75134301594081157746, 855968478539048248916]

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

Content is available under The OEIS End-User License Agreement.