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 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 12 |
| 5 | 18 |
| 6 | 51 |
| 7 | 81 |
| 8 | 220 |
| 9 | 361 |
| 10 | 952 |
| 11 | 1595 |
| 12 | 4118 |
| 13 | 6999 |
| 14 | 17787 |
| 15 | 30548 |
| 16 | 76696 |
| 17 | 132766 |
| 18 | 330148 |
| 19 | 575054 |
| 20 | 1418946 |
| 21 | 2483812 |
| 22 | 6089912 |
| 23 | 10703456 |
| 24 | 26104178 |
| 25 | 46034722 |
| 26 | 111769554 |
| 27 | 197665364 |
| 28 | 478085534 |
| 29 | 847542518 |
| 30 | 2043167075 |