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 | 2 |
| 3 | 10 |
| 4 | 29 |
| 5 | 97 |
| 6 | 739 |
| 7 | 6331 |
| 8 | 8617 |
| 9 | 633127 |
| 10 | 1037497 |
| 11 | 90414391 |
| 12 | 1214394319 |
| 13 | 17506484887 |
| 14 | 38519714137 |
| 15 | 4419404086711 |
| 16 | 10972377997177 |
| 17 | 1410921315134167 |
| 18 | 27316952872520239 |
| 19 | 555986170009834231 |
| 20 | 154130283599461067 |
| 21 | 265123004099257677847 |
| 22 | 883735015159907270617 |
| 23 | 150492959376114678237751 |
| 24 | 293138621437723505079883 |
| 25 | 100289605416287509517021527 |