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) |
|---|---|
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 5 |
| 8 | 14 |
| 9 | 29 |
| 10 | 73 |
| 11 | 229 |
| 12 | 671 |
| 13 | 1840 |
| 14 | 5415 |
| 15 | 16983 |
| 16 | 52547 |
| 17 | 161420 |
| 18 | 511039 |
| 19 | 1655598 |
| 20 | 5372395 |
| 21 | 17527912 |
| 22 | 58076084 |
| 23 | 194676024 |
| 24 | 656160449 |
| 25 | 2227549164 |
| 26 | 7635624954 |
| 27 | 26380508479 |
| 28 | 91696805060 |
| 29 | 320866223000 |
| 30 | 1130833326852 |
| 31 | 4010720214072 |
| 32 | 14306769257286 |