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 | 0 |
| 2 | 27 |
| 3 | 75 |
| 4 | 231 |
| 5 | 311 |
| 6 | 551 |
| 7 | 1031 |
| 8 | 1991 |
| 9 | 2231 |
| 10 | 3191 |
| 11 | 5591 |
| 12 | 14951 |
| 13 | 17111 |
| 14 | 35591 |
| 15 | 39191 |
| 16 | 49271 |
| 17 | 50951 |
| 18 | 76151 |
| 19 | 103991 |
| 20 | 107159 |
| 21 | 114791 |
| 22 | 117911 |
| 23 | 119831 |
| 24 | 166871 |
| 25 | 180311 |
| 26 | 201431 |
| 27 | 255191 |
| 28 | 329111 |
| 29 | 366791 |
| 30 | 391751 |
| 31 | 400391 |
| 32 | 435431 |
| 33 | 465911 |
| 34 | 514751 |
| 35 | 516071 |
| 36 | 576551 |
| 37 | 587831 |
| 38 | 599231 |
| 39 | 712631 |
| 40 | 789311 |
| 41 | 890711 |
| 42 | 890951 |
| 43 | 948191 |
| 44 | 1130951 |
| 45 | 1579751 |