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 | 5 |
| 3 | 53 |
| 4 | 115 |
| 5 | 3163 |
| 6 | 3263 |
| 7 | 170687 |
| 8 | 352399 |
| 9 | 1096397 |
| 10 | 223513 |
| 11 | 28103473 |
| 12 | 28459213 |
| 13 | 4963286677 |
| 14 | 5029541437 |
| 15 | 25532475569 |
| 16 | 51741301813 |
| 17 | 15299527769557 |
| 18 | 15415359085157 |
| 19 | 5677532668504877 |
| 20 | 1144538596366201 |
| 21 | 1156827116999161 |
| 22 | 1166157760248361 |
| 23 | 626832724103131129 |