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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 10 |
| 6 | 26 |
| 7 | 37 |
| 8 | 90 |
| 9 | 165 |
| 10 | 421 |
| 11 | 933 |
| 12 | 1957 |
| 13 | 4005 |
| 14 | 8101 |
| 15 | 8282 |
| 16 | 24666 |
| 17 | 40869 |
| 18 | 106405 |
| 19 | 237477 |
| 20 | 286810 |
| 21 | 811098 |
| 22 | 1286053 |
| 23 | 3383205 |
| 24 | 5005402 |
| 25 | 11771813 |
| 26 | 28549029 |
| 27 | 38559834 |
| 28 | 105668698 |
| 29 | 239886426 |
| 30 | 296984485 |
| 31 | 833855397 |
| 32 | 1313628250 |
| 33 | 3461111898 |
| 34 | 7756079194 |
| 35 | 9423789989 |
[0,1,2,5,10,26,37,90,165,421,933,1957,4005,8101, 8282,24666,40869,106405,237477,286810,811098, 1286053,3383205,5005402,11771813,28549029, 38559834,105668698,239886426,296984485,833855397, 1313628250,3461111898,7756079194,9423789989] |