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 | 0 |
| 2 | 1 |
| 3 | 6 |
| 4 | 22 |
| 5 | 66 |
| 6 | 151 |
| 7 | 312 |
| 8 | 564 |
| 9 | 984 |
| 10 | 1601 |
| 11 | 2478 |
| 12 | 3622 |
| 13 | 5242 |
| 14 | 7271 |
| 15 | 9856 |
| 16 | 13124 |
| 17 | 17296 |
| 18 | 22229 |
| 19 | 28286 |
| 20 | 35306 |
| 21 | 43850 |
| 22 | 53891 |
| 23 | 65520 |
| 24 | 78624 |
| 25 | 94272 |
| 26 | 111977 |
| 27 | 131990 |
| 28 | 154514 |
| 29 | 180290 |
| 30 | 208611 |
| 31 | 240840 |
| 32 | 276032 |
| 33 | 315720 |
| 34 | 359497 |
| 35 | 407470 |
| 36 | 460078 |
| 37 | 519018 |
| 38 | 582447 |
| 39 | 651232 |
| 40 | 725820 |
| 41 | 808416 |