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 | 7 |
| 2 | 56 |
| 3 | 287 |
| 4 | 1120 |
| 5 | 3591 |
| 6 | 9912 |
| 7 | 24319 |
| 8 | 54272 |
| 9 | 112071 |
| 10 | 216952 |
| 11 | 397727 |
| 12 | 696032 |
| 13 | 1170247 |
| 14 | 1900152 |
| 15 | 2992383 |
| 16 | 4586752 |
| 17 | 6863495 |
| 18 | 10051512 |
| 19 | 14437663 |
| 20 | 20377184 |
| 21 | 28305287 |
| 22 | 38750008 |
| 23 | 52346367 |
| 24 | 69851904 |
| 25 | 92163655 |
| 26 | 120336632 |
| 27 | 155603871 |