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 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 10 |
| 5 | 32 |
| 6 | 101 |
| 7 | 334 |
| 8 | 1129 |
| 9 | 3890 |
| 10 | 13618 |
| 11 | 48275 |
| 12 | 172995 |
| 13 | 625574 |
| 14 | 2279997 |
| 15 | 8366553 |
| 16 | 30885640 |
| 17 | 114620926 |
| 18 | 427383918 |
| 19 | 1600323161 |
| 20 | 6015226752 |
| 21 | 22687991095 |
| 22 | 85843131701 |
| 23 | 325734335544 |
| 24 | 1239274254094 |
| 25 | 4726359853214 |
| 26 | 18065978123065 |