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) |
|---|---|
| 0 | 1 |
| 1 | 46 |
| 2 | 937 |
| 3 | 12331 |
| 4 | 123216 |
| 5 | 1019051 |
| 6 | 7349140 |
| 7 | 47816612 |
| 8 | 287357460 |
| 9 | 1622135139 |
| 10 | 8709442871 |
| 11 | 44899559053 |
| 12 | 223883501478 |
| 13 | 1086005140508 |
| 14 | 5148332487873 |
| 15 | 23940669359515 |
| 16 | 109535136537197 |
| 17 | 494307574790201 |
| 18 | 2204762394907238 |
| 19 | 9736270202183689 |
| 20 | 42629974672006973 |