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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 3 |
| 4 | 0 |
| 5 | 15 |
| 6 | 12 |
| 7 | 77 |
| 8 | 32 |
| 9 | 261 |
| 10 | 260 |
| 11 | 1023 |
| 12 | 1056 |
| 13 | 4095 |
| 14 | 6552 |
| 15 | 19905 |
| 16 | 15872 |
| 17 | 66045 |
| 18 | 97740 |
| 19 | 262143 |
| 20 | 321320 |
| 21 | 1404375 |
| 22 | 1391720 |
| 23 | 4198397 |
| 24 | 6108912 |
| 25 | 17619525 |
| 26 | 23153832 |
| 27 | 79255071 |
| 28 | 116921224 |
| 29 | 268435455 |
| 30 | 529405320 |
| 31 | 1259979965 |
| 32 | 1408246784 |
[0,0,3,0,15,12,77,32,261,260,1023,1056,4095,6552, 19905,15872,66045,97740,262143,321320,1404375, 1391720,4198397,6108912,17619525,23153832, 79255071,116921224,268435455,529405320,1259979965, 1408246784] |