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.

A363001 a(n) = denominator(R(n, n, 1)) where R(n, k, x) = Sum_{u=0..k} ( Sum_{j=0..u} x^j * binomial(u, j) * (j + 1)^n ) / (u + 1).

Table of values

n a(n)
0 1
1 2
2 2
3 3
4 2
5 15
6 2
7 105
8 2
9 315
10 2
11 3465
12 2
13 45045
14 2
15 9009
16 2
17 153153
18 2
19 14549535
20 2
21 14549535
22 2
23 19684665
24 2
25 1673196525
26 2
27 5019589575
28 2
29 145568097675
30 2
31 4512611027925
32 2
33 4512611027925
34 2
35 4512611027925
36 2
37 166966608033225
38 2
39 316824683175
40 2
41 6845630929362225

List of values

[1, 2, 2, 3, 2, 15, 2, 105, 2, 315, 2, 3465, 2, 45045, 2, 9009, 2, 153153, 2, 14549535, 2, 14549535, 2, 19684665, 2, 1673196525, 2, 5019589575, 2, 145568097675, 2, 4512611027925, 2, 4512611027925, 2, 4512611027925, 2, 166966608033225, 2, 316824683175, 2, 6845630929362225]