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 | 3 |
| 1 | 11 |
| 2 | 23 |
| 3 | 179 |
| 4 | 365 |
| 5 | 1439 |
| 6 | 2911 |
| 7 | 46147 |
| 8 | 93009 |
| 9 | 369605 |
| 10 | 743409 |
| 11 | 5917879 |
| 12 | 11887761 |
| 13 | 47365319 |
| 14 | 95064943 |
| 15 | 3032383331 |
| 16 | 6082445497 |
| 17 | 24264959593 |
| 18 | 48649328861 |
| 19 | 388310999293 |
| 20 | 778263028691 |
| 21 | 3106935548009 |
| 22 | 6225306416473 |
| 23 | 99433372856743 |
| 24 | 199189221750317 |
| 25 | 795541400400905 |