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 | 1 |
| 3 | 1 |
| 4 | 5 |
| 5 | 11 |
| 6 | 21 |
| 7 | 51 |
| 8 | 109 |
| 9 | 229 |
| 10 | 455 |
| 11 | 959 |
| 12 | 1947 |
| 13 | 3963 |
| 14 | 7999 |
| 15 | 16033 |
| 16 | 32333 |
| 17 | 64919 |
| 18 | 130221 |
| 19 | 260967 |
| 20 | 522733 |
| 21 | 1045825 |
| 22 | 2093855 |
| 23 | 4189547 |
| 24 | 8382315 |
| 25 | 16768455 |
| 26 | 33543127 |
| 27 | 67093261 |
| 28 | 134193413 |
| 29 | 268404995 |
| 30 | 536829045 |
| 31 | 1073686083 |
| 32 | 2147408773 |
| 33 | 4294869253 |
| 34 | 8589803783 |