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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 19 |
| 5 | 31 |
| 6 | 41 |
| 7 | 73 |
| 8 | 97 |
| 9 | 193 |
| 10 | 257 |
| 11 | 313 |
| 12 | 487 |
| 13 | 859 |
| 14 | 937 |
| 15 | 1249 |
| 16 | 2539 |
| 17 | 3331 |
| 18 | 3947 |
| 19 | 5351 |
| 20 | 5839 |
| 21 | 7963 |
| 22 | 9257 |
| 23 | 12343 |
| 24 | 21943 |
| 25 | 31687 |
| 26 | 45127 |
| 27 | 60169 |
| 28 | 78791 |
| 29 | 115547 |
| 30 | 180463 |
| 31 | 213881 |
| 32 | 234239 |
| 33 | 270271 |
| 34 | 376603 |
| 35 | 875681 |
| 36 | 1023871 |
| 37 | 1252663 |
| 38 | 1564063 |
| 39 | 2585279 |
| 40 | 4063723 |
| 41 | 5649499 |
| 42 | 9973919 |
| 43 | 11200681 |
| 44 | 39824647 |
| 45 | 41464303 |
| 46 | 73583071 |
| 47 | 95592191 |
| 48 | 226588897 |
| 49 | 1359533387 |
| 50 | 2263333321 |
| 51 | 3349304527 |