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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 9 |
| 5 | 18 |
| 6 | 36 |
| 7 | 60 |
| 8 | 105 |
| 9 | 191 |
| 10 | 314 |
| 11 | 528 |
| 12 | 896 |
| 13 | 1447 |
| 14 | 2355 |
| 15 | 3831 |
| 16 | 6071 |
| 17 | 9619 |
| 18 | 15207 |
| 19 | 23648 |
| 20 | 36693 |
| 21 | 56724 |
| 22 | 86762 |
| 23 | 132264 |
| 24 | 200853 |
| 25 | 302699 |
| 26 | 454565 |
| 27 | 680061 |
| 28 | 1011540 |
| 29 | 1499363 |
| 30 | 2214570 |
| 31 | 3255796 |
| 32 | 4770830 |
| 33 | 6967967 |
| 34 | 10137577 |
| 35 | 14703909 |
| 36 | 21262751 |
| 37 | 30644816 |
| 38 | 44041843 |
[1,1,2,6,9,18,36,60,105,191,314,528,896,1447,2355, 3831,6071,9619,15207,23648,36693,56724,86762, 132264,200853,302699,454565,680061,1011540, 1499363,2214570,3255796,4770830,6967967,10137577, 14703909,21262751,30644816,44041843] |