n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 3 |
6 | 7 |
7 | 16 |
8 | 45 |
9 | 111 |
10 | 311 |
11 | 834 |
12 | 2329 |
13 | 6521 |
14 | 18429 |
15 | 52667 |
16 | 151095 |
17 | 437178 |
18 | 1270035 |
19 | 3710065 |
20 | 10882077 |
21 | 32044740 |
22 | 94700739 |
23 | 280749180 |
24 | 834793837 |
25 | 2488822697 |
26 | 7438604115 |
27 | 22283235185 |
28 | 66893731444 |
29 | 201208674387 |
30 | 606321286160 |
31 | 1830213820180 |
32 | 5533440540954 |
33 | 16754840359013 |
34 | 50803933761199 |
35 | 154251935227044 |
36 | 468929198610654 |
37 | 1427240650197467 |
38 | 4348833380280444 |
39 | 13265036911604648 |
40 | 40502401300634184 |
[1,0,1,1,3,7,16,45,111,311,834,2329,6521,18429, 52667,151095,437178,1270035,3710065,10882077, 32044740,94700739,280749180,834793837,2488822697, 7438604115,22283235185,66893731444,201208674387, 606321286160,1830213820180,5533440540954, 16754840359013,50803933761199,154251935227044, 468929198610654,1427240650197467,4348833380280444, 13265036911604648,40502401300634184] |