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 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 4 |
| 7 | 4 |
| 8 | 7 |
| 9 | 13 |
| 10 | 24 |
| 11 | 24 |
| 12 | 44 |
| 13 | 84 |
| 14 | 161 |
| 15 | 309 |
| 16 | 309 |
| 17 | 594 |
| 18 | 1164 |
| 19 | 2284 |
| 20 | 4484 |
| 21 | 8807 |
| 22 | 8807 |
| 23 | 17305 |
| 24 | 34301 |
| 25 | 68008 |
| 26 | 134852 |
| 27 | 267420 |
| 28 | 530356 |
| 29 | 530356 |
| 30 | 1051905 |
| 31 | 2095003 |
| 32 | 4172701 |
| 33 | 8311101 |
| 34 | 16554194 |
| 35 | 32973536 |
| 36 | 65679652 |
| 37 | 65679652 |
| 38 | 130828948 |
| 39 | 261127540 |
| 40 | 521203175 |
| 41 | 1040311347 |
| 42 | 2076449993 |