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 | 4 |
| 3 | 23 |
| 4 | 199 |
| 5 | 637 |
| 6 | 661 |
| 7 | 8953 |
| 8 | 9187 |
| 9 | 65869 |
| 10 | 201247 |
| 11 | 205927 |
| 12 | 26048 |
| 13 | 132697 |
| 14 | 134272 |
| 15 | 135637 |
| 16 | 2190667 |
| 17 | 24424937 |
| 18 | 3513791 |
| 19 | 131554667 |
| 20 | 132348317 |
| 21 | 133227437 |
| 22 | 938941259 |
| 23 | 947830139 |
| 24 | 190366027 |
| 25 | 2947643 |
| 26 | 74101331 |
| 27 | 223443593 |
| 28 | 2916305159 |
| 29 | 55809797621 |
| 30 | 55978686341 |
| 31 | 3437499844001 |