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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 6 |
| 3 | 22 |
| 4 | 64 |
| 5 | 164 |
| 6 | 392 |
| 7 | 904 |
| 8 | 2048 |
| 9 | 4592 |
| 10 | 10208 |
| 11 | 22496 |
| 12 | 49152 |
| 13 | 106560 |
| 14 | 229504 |
| 15 | 491648 |
| 16 | 1048576 |
| 17 | 2227968 |
| 18 | 4718080 |
| 19 | 9960960 |
| 20 | 20971520 |
| 21 | 44041216 |
| 22 | 92276736 |
| 23 | 192940032 |
| 24 | 402653184 |
| 25 | 838856704 |
| 26 | 1744822272 |
| 27 | 3623870464 |
| 28 | 7516192768 |
[0,1,6,22,64,164,392,904,2048,4592,10208,22496, 49152,106560,229504,491648,1048576,2227968, 4718080,9960960,20971520,44041216,92276736, 192940032,402653184,838856704,1744822272, 3623870464,7516192768] |