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 | 4095 |
| 1 | 258111 |
| 2 | 1864135 |
| 3 | 2987609 |
| 4 | 3582634 |
| 5 | 8080651 |
| 6 | 25473886 |
| 7 | 42292659 |
| 8 | 50776967 |
| 9 | 64081340 |
| 10 | 76144271 |
| 11 | 144414678 |
| 12 | 207994405 |
| 13 | 281196137 |
| 14 | 355414943 |
| 15 | 552485212 |
| 16 | 792267444 |
| 17 | 1128886935 |
| 18 | 1495779625 |
| 19 | 2139400570 |
| 20 | 2234223869 |