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 | 6 |
| 4 | 16 |
| 5 | 41 |
| 6 | 99 |
| 7 | 235 |
| 8 | 565 |
| 9 | 1347 |
| 10 | 3187 |
| 11 | 7515 |
| 12 | 17691 |
| 13 | 41523 |
| 14 | 97240 |
| 15 | 227361 |
| 16 | 530859 |
| 17 | 1237881 |
| 18 | 2883475 |
| 19 | 6710758 |
| 20 | 15606075 |
| 21 | 36268307 |
| 22 | 84239608 |
| 23 | 195567275 |
| 24 | 453832309 |
| 25 | 1052784046 |
| 26 | 2441461427 |
| 27 | 5660381126 |
| 28 | 13120263173 |
| 29 | 30405643251 |
| 30 | 70451852483 |
| 31 | 163217723702 |
| 32 | 378083386517 |