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 | 0 |
| 2 | 10 |
| 3 | 22 |
| 4 | 29 |
| 5 | 74 |
| 6 | 162 |
| 7 | 363 |
| 8 | 782 |
| 9 | 1766 |
| 10 | 3953 |
| 11 | 8784 |
| 12 | 19606 |
| 13 | 43887 |
| 14 | 98136 |
| 15 | 219234 |
| 16 | 490655 |
| 17 | 1098086 |
| 18 | 2457684 |
| 19 | 5502261 |
| 20 | 12323540 |
| 21 | 27604374 |
| 22 | 61847407 |
| 23 | 138600898 |
| 24 | 310664178 |
| 25 | 696450255 |
| 26 | 1561597724 |
| 27 | 3502013800 |
| 28 | 7854708637 |
| 29 | 17619975144 |