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 | 69 |
| 3 | 8057 |
| 4 | 67215 |
| 5 | 754342 |
| 6 | 45293985 |
| 7 | 1610981344 |
| 8 | 33425081735 |
| 9 | 874581570077 |
| 10 | 29281129310008 |
| 11 | 859429362196818 |
| 12 | 23114288469712129 |
| 13 | 662232886527397803 |
| 14 | 19622752789142693265 |
| 15 | 564182183135035001141 |
| 16 | 16033004070256687706334 |