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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 15 |
| 6 | 24 |
| 7 | 49 |
| 8 | 128 |
| 9 | 189 |
| 10 | 480 |
| 11 | 1023 |
| 12 | 1536 |
| 13 | 4095 |
| 14 | 6272 |
| 15 | 10125 |
| 16 | 32768 |
| 17 | 65025 |
| 18 | 96768 |
| 19 | 262143 |
| 20 | 491520 |
| 21 | 583443 |
| 22 | 2095104 |
| 23 | 4190209 |
| 24 | 6291456 |
| 25 | 15728625 |
| 26 | 33546240 |
| 27 | 49545027 |
| 28 | 102760448 |
| 29 | 268435455 |
| 30 | 331776000 |
| 31 | 887503681 |
| 32 | 2147483648 |
| 33 | 3211797501 |
| 34 | 8522956800 |
| 35 | 12325233375 |
| 36 | 25367150592 |
| 37 | 68719476735 |
| 38 | 137438429184 |
| 39 | 206007472125 |