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 | 4 |
| 3 | 8 |
| 4 | 20 |
| 5 | 37 |
| 6 | 86 |
| 7 | 173 |
| 8 | 372 |
| 9 | 788 |
| 10 | 1680 |
| 11 | 3550 |
| 12 | 7554 |
| 13 | 15994 |
| 14 | 33820 |
| 15 | 71374 |
| 16 | 150376 |
| 17 | 316151 |
| 18 | 663474 |
| 19 | 1389760 |
| 20 | 2906116 |
| 21 | 6066899 |
| 22 | 12645608 |
| 23 | 26318870 |
| 24 | 54700044 |
| 25 | 113536171 |
| 26 | 235363832 |
| 27 | 487342781 |
| 28 | 1007969620 |
| 29 | 2082597193 |
| 30 | 4298660754 |
| 31 | 8864505305 |
| 32 | 18263797648 |
| 33 | 37597869188 |