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 | 1 |
| 2 | 7 |
| 3 | 203 |
| 4 | 11977 |
| 5 | 154553 |
| 6 | 353423 |
| 7 | 4482037 |
| 8 | 9904979 |
| 9 | 20851957 |
| 10 | 69262991 |
| 11 | 264440183 |
| 12 | 6824905927 |
| 13 | 7803226417 |
| 14 | 17244568439 |
| 15 | 47773414171 |
| 16 | 57280493557 |
| 17 | 120586867331 |
| 18 | 197922271883 |
| 19 | 218692031341 |
| 20 | 249815987281 |
| 21 | 409580786629 |
| 22 | 460390358603 |
| 23 | 802768833013 |
| 24 | 963574941161 |
| 25 | 1003238606531 |
| 26 | 1146808373599 |
| 27 | 1385429010959 |
| 28 | 1529257578289 |