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 | 7 |
| 2 | 47 |
| 3 | 79 |
| 4 | 97 |
| 5 | 409 |
| 6 | 449 |
| 7 | 479 |
| 8 | 499 |
| 9 | 709 |
| 10 | 797 |
| 11 | 907 |
| 12 | 947 |
| 13 | 977 |
| 14 | 997 |
| 15 | 4007 |
| 16 | 4049 |
| 17 | 4079 |
| 18 | 4099 |
| 19 | 4409 |
| 20 | 4447 |
| 21 | 4799 |
| 22 | 4909 |
| 23 | 4999 |
| 24 | 7079 |
| 25 | 7477 |
| 26 | 7499 |
| 27 | 7907 |
| 28 | 7949 |
| 29 | 9007 |
| 30 | 9049 |
| 31 | 9479 |
| 32 | 9497 |
| 33 | 9749 |
| 34 | 9907 |
| 35 | 9949 |
| 36 | 40009 |
| 37 | 40099 |
| 38 | 40499 |
| 39 | 40709 |
| 40 | 40949 |
| 41 | 44449 |
| 42 | 44497 |
| 43 | 44777 |
| 44 | 44797 |
| 45 | 44909 |