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 | 4 |
| 3 | 6 |
| 4 | 19 |
| 5 | 14 |
| 6 | 113 |
| 7 | 30 |
| 8 | 584 |
| 9 | 1150 |
| 10 | 4023 |
| 11 | 112 |
| 12 | 119866 |
| 13 | 202 |
| 14 | 432061 |
| 15 | 5442765 |
| 16 | 16646712 |
| 17 | 594 |
| 18 | 738090160 |
| 19 | 980 |
| 20 | 13160013662 |
| 21 | 113864783987 |
| 22 | 39049423043 |
| 23 | 2510 |
| 24 | 44452496723053 |
| 25 | 19373518220009 |
| 26 | 21970704599961 |
| 27 | 8858890258339122 |
| 28 | 43233899006497146 |
| 29 | 9130 |
| 30 | 4019875470540832643 |