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 | 3 |
| 2 | 13 |
| 3 | 73 |
| 4 | 401 |
| 5 | 241 |
| 6 | 865 |
| 7 | 8405 |
| 8 | 4033 |
| 9 | 10567 |
| 10 | 14261 |
| 11 | 35171 |
| 12 | 64521 |
| 13 | 112691 |
| 14 | 134641 |
| 15 | 256831 |
| 16 | 159121 |
| 17 | 1214533 |
| 18 | 597081 |
| 19 | 2277139 |
| 20 | 1039681 |
| 21 | 5972401 |
| 22 | 2307317 |
| 23 | 12033793 |
| 24 | 9403681 |
| 25 | 5313463 |
| 26 | 23777761 |
| 27 | 84502091 |
| 28 | 19773769 |
| 29 | 159227791 |
| 30 | 9377213 |
| 31 | 146793539 |
| 32 | 114748705 |
| 33 | 245856241 |