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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 70 |
| 3 | 4025 |
| 4 | 431636 |
| 5 | 75114998 |
| 6 | 19449364539 |
| 7 | 7059006496410 |
| 8 | 3437740821764782 |
| 9 | 2172596362927904998 |
| 10 | 1735323511562307096513 |
| 11 | 1714589657484702134799407 |
| 12 | 2058734042458059390066278968 |
| 13 | 2959366820014712815406422598389 |
| 14 | 5028070020338050558675966002870476 |