n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 2 |
6 | 7 |
7 | 19 |
8 | 54 |
9 | 147 |
10 | 418 |
11 | 1150 |
12 | 3254 |
13 | 9138 |
14 | 25953 |
15 | 73717 |
16 | 210719 |
17 | 603370 |
18 | 1734739 |
19 | 4998542 |
20 | 14444576 |
21 | 41829991 |
22 | 121406927 |
23 | 353029078 |
24 | 1028417980 |
25 | 3000754648 |
26 | 8769118355 |
27 | 25661830891 |
28 | 75194886765 |
29 | 220605144778 |
30 | 647942827064 |
31 | 1905103686527 |
32 | 5607037213434 |
33 | 16517892572160 |
34 | 48703328674762 |
[0,0,0,1,2,7,19,54,147,418,1150,3254,9138,25953, 73717,210719,603370,1734739,4998542,14444576, 41829991,121406927,353029078,1028417980, 3000754648,8769118355,25661830891,75194886765, 220605144778,647942827064,1905103686527, 5607037213434,16517892572160,48703328674762] |