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 | 2 |
| 1 | 13 |
| 2 | 29 |
| 3 | 19 |
| 4 | 233 |
| 5 | 19141 |
| 6 | 20593 |
| 7 | 13063 |
| 8 | 260753 |
| 9 | 1801 |
| 10 | 85403261 |
| 11 | 57154490053 |
| 12 | 2227777 |
| 13 | 222379 |
| 14 | 13156924369 |
| 15 | 35671 |
| 16 | 1200913648289 |
| 17 | 66900193189411 |
| 18 | 122138321401 |
| 19 | 905265296671 |
| 20 | 67657441 |
| 21 | 1885339 |
| 22 | 68368660537 |
| 23 | 49489630860836437 |
| 24 | 592734049 |
| 25 | 438472201 |