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.
n | a(n) |
---|---|
0 | 3 |
1 | 15 |
2 | 70 |
3 | 315 |
4 | 1386 |
5 | 6006 |
6 | 25740 |
7 | 109395 |
8 | 461890 |
9 | 1939938 |
10 | 8112468 |
11 | 33801950 |
12 | 140408100 |
13 | 581690700 |
14 | 2404321560 |
15 | 9917826435 |
16 | 40838108850 |
17 | 167890003050 |
18 | 689232644100 |
19 | 2825853840810 |
20 | 11572544300460 |
21 | 47342226683700 |
22 | 193485622098600 |
23 | 790066290235950 |
24 | 3223470464162676 |