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 | 16 |
| 2 | 115 |
| 3 | 550 |
| 4 | 2035 |
| 5 | 6292 |
| 6 | 17017 |
| 7 | 41470 |
| 8 | 92950 |
| 9 | 194480 |
| 10 | 384098 |
| 11 | 722228 |
| 12 | 1301690 |
| 13 | 2261000 |
| 14 | 3801710 |
| 15 | 6210644 |
| 16 | 9887999 |
| 17 | 15382400 |
| 18 | 23434125 |
| 19 | 35027850 |
| 20 | 51456405 |
| 21 | 74397180 |
| 22 | 106002975 |
| 23 | 149009250 |
| 24 | 206859900 |
| 25 | 283853856 |
| 26 | 385314996 |
| 27 | 517788040 |