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 | 11 |
| 2 | 41 |
| 3 | 91 |
| 4 | 161 |
| 5 | 251 |
| 6 | 361 |
| 7 | 491 |
| 8 | 641 |
| 9 | 811 |
| 10 | 10001 |
| 11 | 12101 |
| 12 | 14401 |
| 13 | 16901 |
| 14 | 19601 |
| 15 | 22501 |
| 16 | 25601 |
| 17 | 28901 |
| 18 | 32401 |
| 19 | 36101 |
| 20 | 40001 |
| 21 | 44101 |
| 22 | 48401 |
| 23 | 52901 |
| 24 | 57601 |
| 25 | 62501 |
| 26 | 67601 |
| 27 | 72901 |
| 28 | 78401 |
| 29 | 84101 |
| 30 | 90001 |
| 31 | 96101 |
| 32 | 102401 |
| 33 | 108901 |
| 34 | 115601 |
| 35 | 122501 |
| 36 | 129601 |
| 37 | 136901 |
| 38 | 144401 |
| 39 | 152101 |