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 | 2 |
| 3 | 4 |
| 4 | 9 |
| 5 | 21 |
| 6 | 50 |
| 7 | 118 |
| 8 | 279 |
| 9 | 661 |
| 10 | 1566 |
| 11 | 3711 |
| 12 | 8795 |
| 13 | 20843 |
| 14 | 49396 |
| 15 | 117064 |
| 16 | 277432 |
| 17 | 657492 |
| 18 | 1558206 |
| 19 | 3692830 |
| 20 | 8751726 |
| 21 | 20740926 |
| 22 | 49154420 |
| 23 | 116492243 |
| 24 | 276077771 |
| 25 | 654283356 |
| 26 | 1550601878 |
| 27 | 3674808723 |
| 28 | 8709017668 |
| 29 | 20639710651 |
| 30 | 48914547197 |
| 31 | 115923763079 |
[1,1,2,4,9,21,50,118,279,661,1566,3711,8795,20843, 49396,117064,277432,657492,1558206,3692830, 8751726,20740926,49154420,116492243,276077771, 654283356,1550601878,3674808723,8709017668, 20639710651,48914547197,115923763079] |