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 | 4 |
| 4 | 6 |
| 5 | 48 |
| 6 | 50 |
| 7 | 52 |
| 8 | 54 |
| 9 | 56 |
| 10 | 58 |
| 11 | 1375 |
| 12 | 1377 |
| 13 | 1379 |
| 14 | 1381 |
| 15 | 1383 |
| 16 | 1385 |
| 17 | 1387 |
| 18 | 1389 |
| 19 | 1391 |
| 20 | 1393 |
| 21 | 1395 |
| 22 | 1397 |
| 23 | 3739 |
| 24 | 3741 |
| 25 | 3743 |
| 26 | 3745 |
| 27 | 3747 |
| 28 | 3749 |
| 29 | 3751 |
| 30 | 3753 |
| 31 | 3755 |
| 32 | 3757 |
| 33 | 3759 |
| 34 | 3761 |
| 35 | 3763 |
| 36 | 3765 |
| 37 | 3767 |
| 38 | 3769 |
| 39 | 3771 |
| 40 | 3773 |
| 41 | 6681 |
| 42 | 6683 |
| 43 | 6685 |
| 44 | 6687 |
| 45 | 6689 |
| 46 | 6691 |
| 47 | 6693 |
| 48 | 6695 |
| 49 | 6697 |
| 50 | 6699 |
| 51 | 6701 |
| 52 | 6703 |
| 53 | 6705 |