The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 4 |
| 6 | 10 |
| 7 | 14 |
| 8 | 36 |
| 9 | 50 |
| 10 | 138 |
| 11 | 202 |
| 12 | 561 |
| 13 | 875 |
| 14 | 2571 |
| 15 | 4105 |
| 16 | 12548 |
| 17 | 20647 |
| 18 | 65456 |
| 19 | 109298 |
| 20 | 356466 |
| 21 | 601476 |
| 22 | 2005341 |
| 23 | 3403126 |
| 24 | 11522216 |
| 25 | 19628059 |
| 26 | 67182654 |
| 27 | 114700263 |
| 28 | 395494722 |
| 29 | 676207627 |
| 30 | 2343260789 |
| 31 | 4010090462 |
| 32 | 13942474064 |
| 33 | 23874361996 |
| 34 | 83192218842 |
| 35 | 142508723632 |
[1,1,1,1,3,4,10,14,36,50,138,202,561,875,2571, 4105,12548,20647,65456,109298,356466,601476, 2005341,3403126,11522216,19628059,67182654, 114700263,395494722,676207627,2343260789, 4010090462,13942474064,23874361996,83192218842, 142508723632] |