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) |
|---|---|
| 4 | 1 |
| 5 | 20 |
| 6 | 90 |
| 7 | 259 |
| 8 | 602 |
| 9 | 1230 |
| 10 | 2298 |
| 11 | 4015 |
| 12 | 6655 |
| 13 | 10569 |
| 14 | 16198 |
| 15 | 24087 |
| 16 | 34900 |
| 17 | 49436 |
| 18 | 68646 |
| 19 | 93651 |
| 20 | 125761 |
| 21 | 166495 |
| 22 | 217602 |
| 23 | 281083 |
| 24 | 359214 |
| 25 | 454570 |
| 26 | 570050 |
| 27 | 708903 |
| 28 | 874755 |
| 29 | 1071637 |
| 30 | 1304014 |
| 31 | 1576815 |
| 32 | 1895464 |
| 33 | 2265912 |
| 34 | 2694670 |
| 35 | 3188843 |
| 36 | 3756165 |
| 37 | 4405035 |
| 38 | 5144554 |
| 39 | 5984563 |
| 40 | 6935682 |