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 | 2 |
| 1 | 6 |
| 2 | 12 |
| 3 | 30 |
| 4 | 60 |
| 5 | 120 |
| 6 | 240 |
| 7 | 510 |
| 8 | 1020 |
| 9 | 2040 |
| 10 | 4080 |
| 11 | 8160 |
| 12 | 16320 |
| 13 | 32640 |
| 14 | 65280 |
| 15 | 131070 |
| 16 | 262140 |
| 17 | 524280 |
| 18 | 1048560 |
| 19 | 2097120 |
| 20 | 4194240 |
| 21 | 8388480 |
| 22 | 16776960 |
| 23 | 33553920 |
| 24 | 67107840 |
| 25 | 134215680 |
| 26 | 268431360 |
| 27 | 536862720 |
| 28 | 1073725440 |
| 29 | 2147450880 |
| 30 | 4294901760 |
| 31 | 8589934590 |