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 | 86 |
| 1 | 176 |
| 2 | 558 |
| 3 | 2486 |
| 4 | 13578 |
| 5 | 83486 |
| 6 | 552378 |
| 7 | 3835406 |
| 8 | 27530298 |
| 9 | 202345886 |
| 10 | 1513288698 |
| 11 | 11466138926 |
| 12 | 87752274618 |
| 13 | 676845479486 |
| 14 | 5252962429818 |
| 15 | 40970428516046 |
| 16 | 320834049236538 |
| 17 | 2520676708888286 |
| 18 | 19857791921151738 |
| 19 | 156791682937990766 |
| 20 | 1240318818550256058 |