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 | 2 |
| 2 | 7 |
| 3 | 29 |
| 4 | 130 |
| 5 | 611 |
| 6 | 2965 |
| 7 | 14726 |
| 8 | 74443 |
| 9 | 381617 |
| 10 | 1978582 |
| 11 | 10355303 |
| 12 | 54628201 |
| 13 | 290148890 |
| 14 | 1550177791 |
| 15 | 8324934533 |
| 16 | 44911554826 |
| 17 | 243274479131 |
| 18 | 1322555721037 |
| 19 | 7213659006350 |
| 20 | 39462884371891 |
| 21 | 216470673634217 |
| 22 | 1190382865461742 |
| 23 | 6560913758341199 |