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) |
|---|---|
| 1 | 20 |
| 2 | 134 |
| 3 | 1934 |
| 4 | 9773 |
| 5 | 19042 |
| 6 | 138902 |
| 7 | 104024 |
| 8 | 512255 |
| 9 | 1400180 |
| 10 | 1558490 |
| 11 | 1441174 |
| 12 | 9363253 |
| 13 | 20454244 |
| 14 | 98854550 |
| 15 | 57515874 |
| 16 | 201139683 |
| 17 | 49085531 |
| 18 | 213492618 |
| 19 | 475478220 |
| 20 | 1152519092 |