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 | 3 |
| 2 | 7 |
| 3 | 15 |
| 4 | 27 |
| 5 | 43 |
| 6 | 63 |
| 7 | 87 |
| 8 | 115 |
| 9 | 147 |
| 10 | 183 |
| 11 | 223 |
| 12 | 267 |
| 13 | 315 |
| 14 | 367 |
| 15 | 423 |
| 16 | 483 |
| 17 | 547 |
| 18 | 615 |
| 19 | 687 |
| 20 | 763 |
| 21 | 843 |
| 22 | 927 |
| 23 | 1015 |
| 24 | 1107 |
| 25 | 1203 |
| 26 | 1303 |
| 27 | 1407 |
| 28 | 1515 |
| 29 | 1627 |
| 30 | 1743 |
| 31 | 1863 |
| 32 | 1987 |
| 33 | 2115 |
| 34 | 2247 |
| 35 | 2383 |
| 36 | 2523 |
| 37 | 2667 |
| 38 | 2815 |
| 39 | 2967 |
| 40 | 3123 |
| 41 | 3283 |
| 42 | 3447 |
| 43 | 3615 |
| 44 | 3787 |
| 45 | 3963 |
| 46 | 4143 |
| 47 | 4327 |
| 48 | 4515 |
| 49 | 4707 |