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) |
|---|---|
| 0 | 3 |
| 1 | 10 |
| 2 | 21 |
| 3 | 42 |
| 4 | 74 |
| 5 | 123 |
| 6 | 197 |
| 7 | 303 |
| 8 | 452 |
| 9 | 659 |
| 10 | 943 |
| 11 | 1323 |
| 12 | 1830 |
| 13 | 2496 |
| 14 | 3363 |
| 15 | 4485 |
| 16 | 5922 |
| 17 | 7748 |
| 18 | 10058 |
| 19 | 12958 |
| 20 | 16578 |
| 21 | 21077 |
| 22 | 26637 |
| 23 | 33476 |
| 24 | 41855 |
| 25 | 52077 |
| 26 | 64496 |
| 27 | 79536 |
| 28 | 97683 |
| 29 | 119505 |
| 30 | 145671 |
| 31 | 176948 |
| 32 | 214225 |
| 33 | 258542 |
| 34 | 311085 |
| 35 | 373227 |
| 36 | 446553 |
| 37 | 532873 |
| 38 | 634265 |
| 39 | 753118 |