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 | 8 |
| 3 | 44 |
| 4 | 192 |
| 5 | 718 |
| 6 | 2400 |
| 7 | 7352 |
| 8 | 20992 |
| 9 | 56549 |
| 10 | 145008 |
| 11 | 356388 |
| 12 | 844032 |
| 13 | 1934534 |
| 14 | 4306368 |
| 15 | 9337704 |
| 16 | 19771392 |
| 17 | 40965362 |
| 18 | 83207976 |
| 19 | 165944732 |
| 20 | 325393024 |
| 21 | 628092832 |
| 22 | 1194744096 |
| 23 | 2241688744 |
| 24 | 4152367104 |
| 25 | 7599231223 |
| 26 | 13749863984 |