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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 4 |
| 6 | 10 |
| 7 | 24 |
| 8 | 57 |
| 9 | 128 |
| 10 | 278 |
| 11 | 596 |
| 12 | 1260 |
| 13 | 2628 |
| 14 | 5430 |
| 15 | 11136 |
| 16 | 22683 |
| 17 | 45936 |
| 18 | 92574 |
| 19 | 185764 |
| 20 | 371347 |
| 21 | 739840 |
| 22 | 1469580 |
| 23 | 2911224 |
| 24 | 5753048 |
| 25 | 11343800 |
| 26 | 22322444 |
| 27 | 43845120 |
| 28 | 85973013 |
| 29 | 168314604 |
| 30 | 329041842 |
| 31 | 642385248 |
| 32 | 1252552077 |
| 33 | 2439430272 |
| 34 | 4745767138 |
| 35 | 9223159852 |