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 | 7 |
| 3 | 20 |
| 4 | 53 |
| 5 | 125 |
| 6 | 287 |
| 7 | 606 |
| 8 | 1226 |
| 9 | 2358 |
| 10 | 4356 |
| 11 | 7740 |
| 12 | 13327 |
| 13 | 22239 |
| 14 | 36151 |
| 15 | 57336 |
| 16 | 88962 |
| 17 | 135249 |
| 18 | 201912 |
| 19 | 296324 |
| 20 | 428211 |
| 21 | 609935 |
| 22 | 857327 |
| 23 | 1190216 |
| 24 | 1633551 |
| 25 | 2218011 |
| 26 | 2981607 |
| 27 | 3970548 |
| 28 | 5241120 |
| 29 | 6861024 |
| 30 | 8911782 |
| 31 | 11490282 |
| 32 | 14711976 |
| 33 | 18712911 |
| 34 | 23653440 |