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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 3 |
| 4 | 28 |
| 5 | 15 |
| 6 | 64 |
| 7 | 111 |
| 8 | 464 |
| 9 | 31 |
| 10 | 1760 |
| 11 | 383 |
| 12 | 6144 |
| 13 | 3455 |
| 14 | 28800 |
| 15 | 5375 |
| 16 | 99584 |
| 17 | 53759 |
| 18 | 464384 |
| 19 | 83967 |
| 20 | 1593344 |
| 21 | 858111 |
| 22 | 7456768 |
| 23 | 1486847 |
| 24 | 25300992 |
| 25 | 14327807 |
| 26 | 121151488 |
| 27 | 21643263 |
| 28 | 407027712 |
| 29 | 224985087 |
| 30 | 1904869376 |
| 31 | 383975423 |
| 32 | 6466109440 |
| 33 | 3288727551 |
[1,1,6,3,28,15,64,111,464,31,1760,383,6144,3455, 28800,5375,99584,53759,464384,83967,1593344, 858111,7456768,1486847,25300992,14327807, 121151488,21643263,407027712,224985087,1904869376, 383975423,6466109440,3288727551] |