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 | 2 |
| 2 | 7 |
| 3 | 26 |
| 4 | 95 |
| 5 | 340 |
| 6 | 1193 |
| 7 | 4116 |
| 8 | 14001 |
| 9 | 47064 |
| 10 | 156629 |
| 11 | 516844 |
| 12 | 1693073 |
| 13 | 5511218 |
| 14 | 17841247 |
| 15 | 57477542 |
| 16 | 184377699 |
| 17 | 589195584 |
| 18 | 1876395357 |
| 19 | 5957318820 |
| 20 | 18861068265 |
| 21 | 59563612974 |
| 22 | 187668462027 |
| 23 | 590039959434 |
| 24 | 1851508693479 |
| 25 | 5799494052414 |
| 26 | 18135645594003 |