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 | 1 |
| 2 | 514 |
| 3 | 20710 |
| 4 | 303050 |
| 5 | 2538515 |
| 6 | 14851676 |
| 7 | 67518444 |
| 8 | 254402940 |
| 9 | 828707925 |
| 10 | 2403012910 |
| 11 | 6335265586 |
| 12 | 15427298614 |
| 13 | 35123831015 |
| 14 | 75481410200 |
| 15 | 154282348760 |
| 16 | 301802764056 |
| 17 | 567911055849 |
| 18 | 1032378638010 |
| 19 | 1819533917950 |
| 20 | 3118689197890 |
| 21 | 5212124524411 |
| 22 | 8512829068724 |
| 23 | 13614686274500 |
| 24 | 21358351020500 |
| 25 | 32916713032125 |
| 26 | 49904578722726 |