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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 11 |
| 6 | 23 |
| 7 | 57 |
| 8 | 149 |
| 9 | 379 |
| 10 | 928 |
| 11 | 2227 |
| 12 | 5336 |
| 13 | 12872 |
| 14 | 31236 |
| 15 | 75949 |
| 16 | 184524 |
| 17 | 447702 |
| 18 | 1085401 |
| 19 | 2631240 |
| 20 | 6380241 |
| 21 | 15474230 |
| 22 | 37533077 |
| 23 | 91034937 |
| 24 | 220790480 |
| 25 | 535475968 |
| 26 | 1298668192 |
| 27 | 3149634952 |
| 28 | 7638811025 |
| 29 | 18526466357 |
| 30 | 44932341015 |
| 31 | 108974456212 |
| 32 | 264295580664 |
[0,1,3,6,11,23,57,149,379,928,2227,5336,12872, 31236,75949,184524,447702,1085401,2631240,6380241, 15474230,37533077,91034937,220790480,535475968, 1298668192,3149634952,7638811025,18526466357, 44932341015,108974456212,264295580664] |