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 | 252 |
| 3 | 8118 |
| 4 | 28382 |
| 5 | 536797635 |
| 6 | 6180330816 |
| 7 | 85770307758 |
| 8 | 2889123219882 |
| 9 | 535841353148535 |
| 10 | 135444949494445310 |
| 11 | 1522312136776312132251 |
| 12 | 2111913320628668260233191112 |
| 13 | 6690072525779588859775252700966 |
| 14 | 202511080654222947749222456080115202 |
| 15 | 538412926804799527505725997408629214835 |