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 | 15 |
| 1 | 30 |
| 2 | 60 |
| 3 | 120 |
| 4 | 240 |
| 5 | 480 |
| 6 | 960 |
| 7 | 1920 |
| 8 | 3840 |
| 9 | 7680 |
| 10 | 15360 |
| 11 | 30720 |
| 12 | 61440 |
| 13 | 122880 |
| 14 | 245760 |
| 15 | 491520 |
| 16 | 983040 |
| 17 | 1966080 |
| 18 | 3932160 |
| 19 | 7864320 |
| 20 | 15728640 |
| 21 | 31457280 |
| 22 | 62914560 |
| 23 | 125829120 |
| 24 | 251658240 |
| 25 | 503316480 |
| 26 | 1006632960 |
| 27 | 2013265920 |
| 28 | 4026531840 |
| 29 | 8053063680 |
| 30 | 16106127360 |