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.

A306842 a(n) = Sum_{d|n} binomial(n,d)*binomial(n,n/d).

Table of values

n a(n)
1 1
2 4
3 6
4 44
5 10
6 612
7 14
8 3936
9 7074
10 22700
11 22
12 339792
13 26
14 624652
15 2732760
16 6401232
17 34
18 45174204
19 38
20 220441080
21 309304842
22 325909628
23 46
24 7330314960
25 2822796950
26 6760390052
27 27417926304
28 78814587656
29 58
30 548150764560
31 62
32 1352747882944
33 2111872688706

List of values

[1, 4, 6, 44, 10, 612, 14, 3936, 7074, 22700, 22, 339792, 26, 624652, 2732760, 6401232, 34, 45174204, 38, 220441080, 309304842, 325909628, 46, 7330314960, 2822796950, 6760390052, 27417926304, 78814587656, 58, 548150764560, 62, 1352747882944, 2111872688706]