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 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 4 |
| 8 | 7 |
| 9 | 13 |
| 10 | 24 |
| 11 | 43 |
| 12 | 78 |
| 13 | 140 |
| 14 | 251 |
| 15 | 452 |
| 16 | 812 |
| 17 | 1457 |
| 18 | 2617 |
| 19 | 4697 |
| 20 | 8428 |
| 21 | 15126 |
| 22 | 27142 |
| 23 | 48700 |
| 24 | 87384 |
| 25 | 156787 |
| 26 | 281307 |
| 27 | 504723 |
| 28 | 905562 |
| 29 | 1624731 |
| 30 | 2915039 |
| 31 | 5230040 |
| 32 | 9383505 |
| 33 | 16835453 |
| 34 | 30205347 |
| 35 | 54192931 |
| 36 | 97230224 |
| 37 | 174445475 |
| 38 | 312981054 |
| 39 | 561534340 |
| 40 | 1007475560 |