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 | 0 |
| 2 | 2 |
| 3 | 1 |
| 4 | 4 |
| 5 | 4 |
| 6 | 9 |
| 7 | 14 |
| 8 | 29 |
| 9 | 52 |
| 10 | 90 |
| 11 | 167 |
| 12 | 312 |
| 13 | 577 |
| 14 | 1072 |
| 15 | 2026 |
| 16 | 3776 |
| 17 | 7177 |
| 18 | 13585 |
| 19 | 25726 |
| 20 | 49125 |
| 21 | 93569 |
| 22 | 178735 |
| 23 | 342381 |
| 24 | 657180 |
| 25 | 1262818 |
| 26 | 2430501 |
| 27 | 4684999 |
| 28 | 9040931 |
| 29 | 17470670 |
| 30 | 33798206 |
| 31 | 65455531 |
| 32 | 126889351 |
| 33 | 246216909 |