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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 18 |
| 7 | 41 |
| 8 | 97 |
| 9 | 236 |
| 10 | 584 |
| 11 | 1474 |
| 12 | 3770 |
| 13 | 9767 |
| 14 | 25575 |
| 15 | 67592 |
| 16 | 180128 |
| 17 | 483502 |
| 18 | 1306308 |
| 19 | 3549830 |
| 20 | 9697162 |
| 21 | 26615698 |
| 22 | 73366980 |
| 23 | 203034787 |
| 24 | 563901485 |
| 25 | 1571351150 |
| 26 | 4392057592 |
| 27 | 12310850747 |
| 28 | 34597448119 |
| 29 | 97466655175 |
| 30 | 275202241799 |
| 31 | 778693720420 |
| 32 | 2207705622668 |
| 33 | 6270783269882 |
| 34 | 17842662379410 |
[1,1,1,2,4,8,18,41,97,236,584,1474,3770,9767, 25575,67592,180128,483502,1306308,3549830,9697162, 26615698,73366980,203034787,563901485,1571351150, 4392057592,12310850747,34597448119,97466655175, 275202241799,778693720420,2207705622668, 6270783269882,17842662379410] |