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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 36 |
| 8 | 57 |
| 9 | 211 |
| 10 | 331 |
| 11 | 958 |
| 12 | 29228 |
| 13 | 64065 |
| 14 | 294659 |
| 15 | 1232479 |
| 16 | 3549717 |
| 17 | 11296603 |
| 18 | 557617987 |
| 19 | 1512758550 |
| 20 | 8514685860 |
| 21 | 41183585167 |
| 22 | 251022906729 |
| 23 | 838303110637 |
| 24 | 4183056225010 |
| 25 | 263978773601641 |
| 26 | 887708421995331 |
| 27 | 5813843897797861 |
| 28 | 32212405278588967 |
| 29 | 216518890998518716 |