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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 26 |
| 6 | 60 |
| 7 | 139 |
| 8 | 321 |
| 9 | 743 |
| 10 | 1716 |
| 11 | 3965 |
| 12 | 9158 |
| 13 | 21152 |
| 14 | 48848 |
| 15 | 112808 |
| 16 | 260500 |
| 17 | 601553 |
| 18 | 1389096 |
| 19 | 3207660 |
| 20 | 7406989 |
| 21 | 17103860 |
| 22 | 39495306 |
| 23 | 91200333 |
| 24 | 210594475 |
| 25 | 486292240 |
| 26 | 1122916743 |
| 27 | 2592971247 |
| 28 | 5987531168 |
| 29 | 13826041086 |
| 30 | 31926247578 |
| 31 | 73722134145 |
| 32 | 170234630412 |