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 | 4 |
| 2 | 5 |
| 3 | 35 |
| 4 | 51 |
| 5 | 154 |
| 6 | 804 |
| 7 | 3596 |
| 8 | 6200 |
| 9 | 7595 |
| 10 | 916538 |
| 11 | 1638039 |
| 12 | 2794805 |
| 13 | 6804035 |
| 14 | 24724472 |
| 15 | 40128444 |
| 16 | 52424787 |
| 17 | 69918849 |
| 18 | 82954611 |
| 19 | 124077316 |
| 20 | 160245605 |
| 21 | 204215514 |
| 22 | 361275551 |
| 23 | 371254235 |
| 24 | 661831521 |
| 25 | 1314759754 |
| 26 | 1695554762 |
| 27 | 2246110022 |
| 28 | 2378746131 |
| 29 | 2889320799 |
| 30 | 4181707719 |