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 | 1 |
| 3 | 3 |
| 4 | 9 |
| 5 | 20 |
| 6 | 44 |
| 7 | 93 |
| 8 | 191 |
| 9 | 390 |
| 10 | 787 |
| 11 | 1600 |
| 12 | 3250 |
| 13 | 6563 |
| 14 | 13227 |
| 15 | 26609 |
| 16 | 53484 |
| 17 | 107588 |
| 18 | 216413 |
| 19 | 434894 |
| 20 | 872834 |
| 21 | 1750938 |
| 22 | 3512454 |
| 23 | 7043770 |
| 24 | 14119562 |
| 25 | 28300792 |
| 26 | 56733873 |
| 27 | 113746102 |
| 28 | 228033527 |
| 29 | 456999525 |
| 30 | 915558925 |
| 31 | 1834081043 |
| 32 | 3674191081 |
| 33 | 7361544506 |
| 34 | 14749015536 |
| 35 | 29545860199 |
| 36 | 59169406092 |