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) |
|---|---|
| 7 | 1 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 3431 |
| 15 | 12868 |
| 16 | 22878 |
| 17 | 38894 |
| 18 | 63646 |
| 19 | 100774 |
| 20 | 155038 |
| 21 | 399072959 |
| 22 | 3291371293 |
| 23 | 17874723750 |
| 24 | 70661650187 |
| 25 | 242176782370 |
| 26 | 762243414933 |
| 27 | 2264604983536 |
| 28 | 478557413505138 |
| 29 | 6864733462145388 |
| 30 | 61394054827641855 |
| 31 | 435803138222232998 |
| 32 | 2588994595597226565 |