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 | 64 |
| 2 | 208 |
| 3 | 676 |
| 4 | 2196 |
| 5 | 7132 |
| 6 | 23168 |
| 7 | 75260 |
| 8 | 244464 |
| 9 | 794096 |
| 10 | 2579500 |
| 11 | 8379052 |
| 12 | 27217860 |
| 13 | 88412560 |
| 14 | 287192948 |
| 15 | 932896352 |
| 16 | 3030352272 |
| 17 | 9843575108 |
| 18 | 31975148500 |
| 19 | 103865731612 |
| 20 | 337389844512 |
| 21 | 1095952482460 |
| 22 | 3560011839440 |
| 23 | 11564081956784 |