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 | 5115 |
| 2 | 10280 |
| 3 | 22866 |
| 4 | 55660 |
| 5 | 138196 |
| 6 | 331584 |
| 7 | 752180 |
| 8 | 1607656 |
| 9 | 3343894 |
| 10 | 7100132 |
| 11 | 15867680 |
| 12 | 37057120 |
| 13 | 87647408 |
| 14 | 203774064 |
| 15 | 457583316 |
| 16 | 996246248 |
| 17 | 2145967651 |
| 18 | 4684383672 |
| 19 | 10501666108 |
| 20 | 24080284440 |
| 21 | 55579151729 |
| 22 | 126886388888 |