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 | 0 |
| 1 | 6 |
| 2 | 30 |
| 3 | 90 |
| 4 | 204 |
| 5 | 390 |
| 6 | 666 |
| 7 | 1050 |
| 8 | 1560 |
| 9 | 2214 |
| 10 | 3030 |
| 11 | 4026 |
| 12 | 5220 |
| 13 | 6630 |
| 14 | 8274 |
| 15 | 10170 |
| 16 | 12336 |
| 17 | 14790 |
| 18 | 17550 |
| 19 | 20634 |
| 20 | 24060 |
| 21 | 27846 |
| 22 | 32010 |
| 23 | 36570 |
| 24 | 41544 |
| 25 | 46950 |
| 26 | 52806 |
| 27 | 59130 |
| 28 | 65940 |
| 29 | 73254 |
| 30 | 81090 |
| 31 | 89466 |
| 32 | 98400 |
| 33 | 107910 |
| 34 | 118014 |
| 35 | 128730 |
| 36 | 140076 |
| 37 | 152070 |