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 | 5 |
| 2 | 14 |
| 3 | 46 |
| 4 | 214 |
| 5 | 1249 |
| 6 | 8248 |
| 7 | 58754 |
| 8 | 440368 |
| 9 | 3425308 |
| 10 | 27411417 |
| 11 | 224368865 |
| 12 | 1870559867 |
| 13 | 15834598305 |
| 14 | 135780264894 |
| 15 | 1177208491861 |
| 16 | 10304192554496 |
| 17 | 90948833260990 |
| 18 | 808675901493606 |
| 19 | 7237518062753712 |
| 20 | 65154265428712141 |