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.

A326963 Number of length n arrays with entries that cover an initial interval of positive integers counting chiral pairs as equivalent, i.e., the arrays are reversible.

Table of values

n a(n)
0 1
1 1
2 2
3 8
4 39
5 277
6 2348
7 23684
8 272955
9 3543901
10 51124052
11 811318628
12 14045786139
13 263429197837
14 5320671508868
15 115141595761844
16 2657827341263595
17 65185383518111581
18 1692767331631966292
19 46400793659715329348
20 1338843898122243225339
21 40562412499252848257197

List of values

[1, 1, 2, 8, 39, 277, 2348, 23684, 272955, 3543901, 51124052, 811318628, 14045786139, 263429197837, 5320671508868, 115141595761844, 2657827341263595, 65185383518111581, 1692767331631966292, 46400793659715329348, 1338843898122243225339, 40562412499252848257197]