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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 5 |
| 8 | 12 |
| 9 | 28 |
| 10 | 63 |
| 11 | 139 |
| 12 | 303 |
| 13 | 653 |
| 14 | 1394 |
| 15 | 2953 |
| 16 | 6215 |
| 17 | 13008 |
| 18 | 27095 |
| 19 | 56201 |
| 20 | 116143 |
| 21 | 239231 |
| 22 | 491326 |
| 23 | 1006420 |
| 24 | 2056633 |
| 25 | 4193706 |
| 26 | 8534653 |
| 27 | 17337764 |
| 28 | 35162804 |
| 29 | 71205504 |
| 30 | 143990366 |
| 31 | 290795624 |
| 32 | 586566102 |
| 33 | 1181834852 |
| 34 | 2378701408 |