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 | 3834 |
| 2 | 10002 |
| 3 | 26637 |
| 4 | 71427 |
| 5 | 191853 |
| 6 | 514687 |
| 7 | 1376128 |
| 8 | 3659968 |
| 9 | 9662878 |
| 10 | 25562476 |
| 11 | 67800449 |
| 12 | 180120882 |
| 13 | 478897973 |
| 14 | 1273545563 |
| 15 | 3386125989 |
| 16 | 8999257525 |
| 17 | 23906208533 |
| 18 | 63493578634 |
| 19 | 168644397152 |
| 20 | 447996097328 |
| 21 | 1190222549456 |