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 | 10 |
| 2 | 28 |
| 3 | 64 |
| 4 | 168 |
| 5 | 440 |
| 6 | 1186 |
| 7 | 3230 |
| 8 | 8896 |
| 9 | 24688 |
| 10 | 68958 |
| 11 | 193610 |
| 12 | 545958 |
| 13 | 1545190 |
| 14 | 4387012 |
| 15 | 12489224 |
| 16 | 35639536 |
| 17 | 101914160 |
| 18 | 291970654 |
| 19 | 837834650 |
| 20 | 2407780858 |
| 21 | 6928681418 |
| 22 | 19961961014 |
| 23 | 57573920446 |
| 24 | 166216938550 |
| 25 | 480300958390 |