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 | 178 |
| 3 | 963 |
| 4 | 3924 |
| 5 | 74736 |
| 6 | 640562 |
| 7 | 4279111 |
| 8 | 46261441 |
| 9 | 428200086 |
| 10 | 3465586864 |
| 11 | 32328050104 |
| 12 | 296748190460 |
| 13 | 2574529121380 |
| 14 | 23200388627087 |
| 15 | 210159449303417 |
| 16 | 1865437561436124 |
| 17 | 16702908801335717 |
| 18 | 150242351184841826 |