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 | 56 |
| 2 | 702 |
| 3 | 15500 |
| 4 | 117306 |
| 5 | 1770230 |
| 6 | 4824612 |
| 7 | 24132656 |
| 8 | 47039022 |
| 9 | 148023722 |
| 10 | 594798932 |
| 11 | 887473890 |
| 12 | 2565675756 |
| 13 | 4750035320 |
| 14 | 6321283542 |
| 15 | 10779111506 |
| 16 | 22164212252 |
| 17 | 42180328262 |
| 18 | 51520147380 |
| 19 | 90458081406 |
| 20 | 128099926010 |