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 | 2 |
| 2 | 15 |
| 3 | 60 |
| 4 | 175 |
| 5 | 420 |
| 6 | 882 |
| 7 | 1680 |
| 8 | 2970 |
| 9 | 4950 |
| 10 | 7865 |
| 11 | 12012 |
| 12 | 17745 |
| 13 | 25480 |
| 14 | 35700 |
| 15 | 48960 |
| 16 | 65892 |
| 17 | 87210 |
| 18 | 113715 |
| 19 | 146300 |
| 20 | 185955 |
| 21 | 233772 |
| 22 | 290950 |
| 23 | 358800 |
| 24 | 438750 |
| 25 | 532350 |
| 26 | 641277 |
| 27 | 767340 |
| 28 | 912485 |
| 29 | 1078800 |
| 30 | 1268520 |
| 31 | 1484032 |
| 32 | 1727880 |
| 33 | 2002770 |
| 34 | 2311575 |
| 35 | 2657340 |
| 36 | 3043287 |
| 37 | 3472820 |
| 38 | 3949530 |
| 39 | 4477200 |
| 40 | 5059810 |
| 41 | 5701542 |
| 42 | 6406785 |
| 43 | 7180140 |