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 | 5 |
| 3 | 15 |
| 4 | 65 |
| 5 | 235 |
| 6 | 665 |
| 7 | 2132 |
| 8 | 2335 |
| 9 | 6515 |
| 10 | 6665 |
| 11 | 23335 |
| 12 | 47162 |
| 13 | 66515 |
| 14 | 66665 |
| 15 | 67485 |
| 16 | 233335 |
| 17 | 235065 |
| 18 | 666515 |
| 19 | 666665 |
| 20 | 2333335 |
| 21 | 6666515 |
| 22 | 6666665 |
| 23 | 23333335 |
| 24 | 64980962 |
| 25 | 66666515 |
| 26 | 66666665 |
| 27 | 233333335 |
| 28 | 666666515 |
| 29 | 666666665 |
| 30 | 2333333335 |
| 31 | 5044357665 |