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 | 190 |
| 2 | 608 |
| 3 | 2028 |
| 4 | 6552 |
| 5 | 20955 |
| 6 | 68120 |
| 7 | 220854 |
| 8 | 711432 |
| 9 | 2300008 |
| 10 | 7446144 |
| 11 | 24054120 |
| 12 | 77722752 |
| 13 | 251353605 |
| 14 | 812507404 |
| 15 | 2625900876 |
| 16 | 8488906820 |
| 17 | 27442096806 |
| 18 | 88701621392 |
| 19 | 286727659260 |
| 20 | 926874621576 |
| 21 | 2996101722471 |
| 22 | 9684839732128 |