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 | 6 |
| 2 | 36 |
| 3 | 58 |
| 4 | 158 |
| 5 | 420 |
| 6 | 1066 |
| 7 | 2754 |
| 8 | 7140 |
| 9 | 18430 |
| 10 | 47602 |
| 11 | 123028 |
| 12 | 317870 |
| 13 | 821262 |
| 14 | 2121988 |
| 15 | 5482746 |
| 16 | 14166078 |
| 17 | 36601876 |
| 18 | 94570810 |
| 19 | 244348930 |
| 20 | 631340852 |
| 21 | 1631238222 |
| 22 | 4214740594 |
| 23 | 10889910564 |
| 24 | 28136999454 |
| 25 | 72699470734 |
| 26 | 187838545012 |