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 | 51 |
| 1 | 351 |
| 2 | 851 |
| 3 | 1551 |
| 4 | 2451 |
| 5 | 3551 |
| 6 | 4851 |
| 7 | 6351 |
| 8 | 8051 |
| 9 | 9951 |
| 10 | 12051 |
| 11 | 14351 |
| 12 | 16851 |
| 13 | 19551 |
| 14 | 22451 |
| 15 | 25551 |
| 16 | 28851 |
| 17 | 32351 |
| 18 | 36051 |
| 19 | 39951 |
| 20 | 44051 |
| 21 | 48351 |
| 22 | 52851 |
| 23 | 57551 |
| 24 | 62451 |
| 25 | 67551 |
| 26 | 72851 |
| 27 | 78351 |
| 28 | 84051 |
| 29 | 89951 |
| 30 | 96051 |
| 31 | 102351 |
| 32 | 108851 |
| 33 | 115551 |
| 34 | 122451 |
| 35 | 129551 |
| 36 | 136851 |
| 37 | 144351 |
| 38 | 152051 |
| 39 | 159951 |