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 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 7 |
| 6 | 23 |
| 7 | 54 |
| 8 | 132 |
| 9 | 290 |
| 10 | 634 |
| 11 | 1342 |
| 12 | 2834 |
| 13 | 5868 |
| 14 | 12140 |
| 15 | 24899 |
| 16 | 50929 |
| 17 | 103735 |
| 18 | 210901 |
| 19 | 427623 |
| 20 | 865910 |
| 21 | 1750505 |
| 22 | 3535098 |
| 23 | 7131321 |
| 24 | 14374647 |
| 25 | 28952661 |
| 26 | 58280123 |
| 27 | 117248217 |
| 28 | 235770302 |
| 29 | 473897980 |
| 30 | 952183214 |
| 31 | 1912535827 |
| 32 | 3840345963 |
| 33 | 7709282937 |
| 34 | 15472242645 |
| 35 | 31045402788 |
| 36 | 62280978042 |