n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 3 |
4 | 12 |
5 | 38 |
6 | 122 |
7 | 372 |
8 | 1119 |
9 | 3301 |
10 | 9624 |
11 | 27756 |
12 | 79380 |
13 | 225384 |
14 | 636061 |
15 | 1785639 |
16 | 4990116 |
17 | 13889618 |
18 | 38524238 |
19 | 106514652 |
20 | 293668923 |
21 | 807608137 |
22 | 2215854384 |
23 | 6066935640 |
24 | 16579195560 |
25 | 45226399440 |
26 | 123173004985 |
27 | 334955873739 |
28 | 909611388732 |
29 | 2466965351678 |
30 | 6682629071522 |
[0,0,1,3,12,38,122,372,1119,3301,9624,27756,79380, 225384,636061,1785639,4990116,13889618,38524238, 106514652,293668923,807608137,2215854384, 6066935640,16579195560,45226399440,123173004985, 334955873739,909611388732,2466965351678, 6682629071522] |