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 | 215 |
| 2 | 2150 |
| 3 | 2385 |
| 4 | 3194 |
| 5 | 21500 |
| 6 | 23850 |
| 7 | 31940 |
| 8 | 38691 |
| 9 | 67571 |
| 10 | 215000 |
| 11 | 238500 |
| 12 | 319400 |
| 13 | 386910 |
| 14 | 675710 |
| 15 | 2150000 |
| 16 | 2385000 |
| 17 | 3194000 |
| 18 | 3869100 |
| 19 | 6757100 |
| 20 | 21500000 |
| 21 | 23850000 |
| 22 | 31940000 |
| 23 | 38691000 |
| 24 | 67571000 |
| 25 | 215000000 |
| 26 | 238500000 |
| 27 | 319400000 |