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 | 121 |
| 3 | 141 |
| 4 | 161 |
| 5 | 171 |
| 6 | 1241 |
| 7 | 1251 |
| 8 | 1261 |
| 9 | 1271 |
| 10 | 1281 |
| 11 | 1341 |
| 12 | 1351 |
| 13 | 1371 |
| 14 | 1391 |
| 15 | 1421 |
| 16 | 1431 |
| 17 | 1461 |
| 18 | 1491 |
| 19 | 1521 |
| 20 | 1541 |
| 21 | 1561 |
| 22 | 1581 |
| 23 | 1591 |
| 24 | 1631 |
| 25 | 1641 |
| 26 | 1651 |
| 27 | 1671 |
| 28 | 1681 |
| 29 | 1691 |
| 30 | 1731 |
| 31 | 1751 |
| 32 | 1761 |
| 33 | 1781 |
| 34 | 1791 |
| 35 | 1821 |
| 36 | 1841 |
| 37 | 1851 |
| 38 | 1891 |
| 39 | 1921 |
| 40 | 1941 |
| 41 | 1961 |
| 42 | 1971 |
| 43 | 1981 |
| 44 | 12321 |
| 45 | 12341 |
| 46 | 12351 |
| 47 | 12361 |
| 48 | 12371 |