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 | 2 |
| 3 | 8 |
| 4 | 29 |
| 5 | 118 |
| 6 | 427 |
| 7 | 1671 |
| 8 | 6260 |
| 9 | 24034 |
| 10 | 91301 |
| 11 | 351261 |
| 12 | 1345434 |
| 13 | 5191170 |
| 14 | 20018845 |
| 15 | 77500485 |
| 16 | 300290041 |
| 17 | 1166450850 |
| 18 | 4535971707 |
| 19 | 17670369300 |
| 20 | 68913194733 |
| 21 | 269114332057 |
| 22 | 1051984590581 |
| 23 | 4116622325140 |
| 24 | 16123381985750 |
| 25 | 63204699026898 |
| 26 | 247956554702702 |