The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 4 |
| 9 | 7 |
| 10 | 9 |
| 11 | 10 |
| 12 | 19 |
| 13 | 26 |
| 14 | 30 |
| 15 | 56 |
| 16 | 75 |
| 17 | 85 |
| 18 | 160 |
| 19 | 216 |
| 20 | 246 |
| 21 | 462 |
| 22 | 622 |
| 23 | 707 |
| 24 | 1329 |
| 25 | 1791 |
| 26 | 2037 |
| 27 | 3828 |
| 28 | 5157 |
| 29 | 5864 |
| 30 | 11021 |
| 31 | 14849 |
| 32 | 16886 |
| 33 | 31735 |
| 34 | 42756 |
| 35 | 48620 |
| 36 | 91376 |
| 37 | 123111 |
| 38 | 139997 |
| 39 | 263108 |
| 40 | 354484 |
| 41 | 403104 |
| 42 | 757588 |
| 43 | 1020696 |
| 44 | 1160693 |
| 45 | 2181389 |
[0,0,1,1,1,1,2,3,4,7,9,10,19,26,30,56,75,85,160, 216,246,462,622,707,1329,1791,2037,3828,5157,5864, 11021,14849,16886,31735,42756,48620,91376,123111, 139997,263108,354484,403104,757588,1020696, 1160693,2181389] |