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 | 8 |
| 2 | 152 |
| 3 | 2744 |
| 4 | 49688 |
| 5 | 941624 |
| 6 | 18381464 |
| 7 | 363917240 |
| 8 | 7248334616 |
| 9 | 144725667128 |
| 10 | 2892582307736 |
| 11 | 57836189374136 |
| 12 | 1156600107729944 |
| 13 | 23131012640050232 |
| 14 | 462612336455034008 |
| 15 | 9252183397644168632 |
| 16 | 185043161299165038872 |
| 17 | 3700859172747355380536 |
| 18 | 74017151029040948253080 |