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 | 2 |
| 3 | 7 |
| 4 | 33 |
| 5 | 191 |
| 6 | 1293 |
| 7 | 9941 |
| 8 | 85137 |
| 9 | 801067 |
| 10 | 8194281 |
| 11 | 90367696 |
| 12 | 1067146336 |
| 13 | 13418399528 |
| 14 | 178808377777 |
| 15 | 2514944176091 |
| 16 | 37204969293137 |
| 17 | 577131827509491 |
| 18 | 9362170099804501 |
| 19 | 158438822236836110 |
| 20 | 2791230865213193695 |
| 21 | 51090157185364462103 |
| 22 | 969892719975254406849 |
| 23 | 19066076629590290124814 |
| 24 | 387539455534509836620517 |
| 25 | 8134022943287699194376826 |
| 26 | 176073319016203896275830713 |