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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 6 |
| 5 | 16 |
| 6 | 29 |
| 7 | 67 |
| 8 | 132 |
| 9 | 288 |
| 10 | 588 |
| 11 | 1253 |
| 12 | 2597 |
| 13 | 5480 |
| 14 | 11430 |
| 15 | 24020 |
| 16 | 50233 |
| 17 | 105383 |
| 18 | 220632 |
| 19 | 462528 |
| 20 | 968808 |
| 21 | 2030377 |
| 22 | 4253641 |
| 23 | 8913436 |
| 24 | 18675174 |
| 25 | 39131464 |
| 26 | 81989909 |
| 27 | 171795691 |
| 28 | 359958780 |
| 29 | 754224480 |
| 30 | 1580315220 |
| 31 | 3311234189 |