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 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 16 |
| 4 | 43 |
| 5 | 102 |
| 6 | 225 |
| 7 | 476 |
| 8 | 983 |
| 9 | 2002 |
| 10 | 4045 |
| 11 | 8136 |
| 12 | 16323 |
| 13 | 32702 |
| 14 | 65465 |
| 15 | 130996 |
| 16 | 262063 |
| 17 | 524202 |
| 18 | 1048485 |
| 19 | 2097056 |
| 20 | 4194203 |
| 21 | 8388502 |
| 22 | 16777105 |
| 23 | 33554316 |
| 24 | 67108743 |
| 25 | 134217602 |
| 26 | 268435325 |
| 27 | 536870776 |
| 28 | 1073741683 |
| 29 | 2147483502 |
| 30 | 4294967145 |
| 31 | 8589934436 |
| 32 | 17179869023 |