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 | 5 |
| 2 | 11 |
| 3 | 19 |
| 4 | 59 |
| 5 | 151 |
| 6 | 191 |
| 7 | 199 |
| 8 | 599 |
| 9 | 911 |
| 10 | 919 |
| 11 | 991 |
| 12 | 1151 |
| 13 | 1511 |
| 14 | 1559 |
| 15 | 1951 |
| 16 | 1999 |
| 17 | 5119 |
| 18 | 5519 |
| 19 | 5591 |
| 20 | 9151 |
| 21 | 9199 |
| 22 | 9511 |
| 23 | 9551 |
| 24 | 11119 |
| 25 | 11159 |
| 26 | 11519 |
| 27 | 11551 |
| 28 | 11959 |
| 29 | 15199 |
| 30 | 15511 |
| 31 | 15551 |
| 32 | 15559 |
| 33 | 15919 |
| 34 | 15959 |
| 35 | 15991 |
| 36 | 19559 |
| 37 | 19919 |
| 38 | 19991 |
| 39 | 51151 |
| 40 | 51199 |
| 41 | 51511 |
| 42 | 51551 |