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 | 2 |
| 2 | 4 |
| 3 | 11 |
| 4 | 22 |
| 5 | 44 |
| 6 | 121 |
| 7 | 242 |
| 8 | 514 |
| 9 | 1331 |
| 10 | 2662 |
| 11 | 5654 |
| 12 | 14641 |
| 13 | 32612 |
| 14 | 65524 |
| 15 | 164351 |
| 16 | 362032 |
| 17 | 1054064 |
| 18 | 2141161 |
| 19 | 4312352 |
| 20 | 11625034 |
| 21 | 23553101 |
| 22 | 50436202 |
| 23 | 131205404 |
| 24 | 262414111 |
| 25 | 555131222 |
| 26 | 1443262444 |
| 27 | 3216555221 |
| 28 | 6436443442 |
| 29 | 16206220214 |
| 30 | 35415440431 |
| 31 | 104134211162 |