The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 9 |
| 6 | 19 |
| 7 | 44 |
| 8 | 99 |
| 9 | 226 |
| 10 | 506 |
| 11 | 1133 |
| 12 | 2506 |
| 13 | 5530 |
| 14 | 12104 |
| 15 | 26408 |
| 16 | 57296 |
| 17 | 123892 |
| 18 | 266712 |
| 19 | 572308 |
| 20 | 1223488 |
| 21 | 2607429 |
| 22 | 5538518 |
| 23 | 11729577 |
| 24 | 24766121 |
| 25 | 52143714 |
| 26 | 109475193 |
| 27 | 229218555 |
| 28 | 478646764 |
| 29 | 996885485 |
| 30 | 2070875492 |
| 31 | 4291068343 |
[1,1,1,2,4,9,19,44,99,226,506,1133,2506,5530, 12104,26408,57296,123892,266712,572308,1223488, 2607429,5538518,11729577,24766121,52143714, 109475193,229218555,478646764,996885485, 2070875492,4291068343] |