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 | 11 |
| 4 | 32 |
| 5 | 87 |
| 6 | 258 |
| 7 | 745 |
| 8 | 2224 |
| 9 | 6605 |
| 10 | 19784 |
| 11 | 59151 |
| 12 | 177438 |
| 13 | 531733 |
| 14 | 1595104 |
| 15 | 4783811 |
| 16 | 14351228 |
| 17 | 43049043 |
| 18 | 129147030 |
| 19 | 387427357 |
| 20 | 1162281532 |
| 21 | 3486804959 |
| 22 | 10460413130 |
| 23 | 31381119537 |
| 24 | 94143358500 |
| 25 | 282429716209 |
| 26 | 847289143468 |
| 27 | 2541866366735 |
| 28 | 7625599086782 |