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 | 0 |
| 2 | 4 |
| 3 | 18 |
| 4 | 60 |
| 5 | 138 |
| 6 | 297 |
| 7 | 528 |
| 8 | 912 |
| 9 | 1440 |
| 10 | 2200 |
| 11 | 3180 |
| 12 | 4536 |
| 13 | 6174 |
| 14 | 8330 |
| 15 | 10920 |
| 16 | 14144 |
| 17 | 17928 |
| 18 | 22599 |
| 19 | 27900 |
| 20 | 34300 |
| 21 | 41580 |
| 22 | 50094 |
| 23 | 59664 |
| 24 | 70848 |
| 25 | 83148 |
| 26 | 97344 |
| 27 | 113022 |
| 28 | 130732 |
| 29 | 150150 |
| 30 | 172125 |
| 31 | 195840 |
| 32 | 222464 |
| 33 | 251328 |
| 34 | 283220 |
| 35 | 317628 |
| 36 | 355752 |
| 37 | 396378 |
| 38 | 441142 |