n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 4 |
6 | 6 |
7 | 4 |
8 | 14 |
9 | 58 |
10 | 92 |
11 | 210 |
12 | 634 |
13 | 1502 |
14 | 3394 |
15 | 9168 |
16 | 23090 |
17 | 57376 |
18 | 148201 |
19 | 387626 |
20 | 999878 |
21 | 2611796 |
22 | 6901985 |
23 | 18213420 |
24 | 48189019 |
25 | 128283468 |
26 | 342172298 |
27 | 913765356 |
28 | 2447082537 |
29 | 6567061364 |
30 | 17646783586 |
31 | 47498319984 |
[0,0,4,6,4,14,58,92,210,634,1502,3394,9168,23090, 57376,148201,387626,999878,2611796,6901985, 18213420,48189019,128283468,342172298,913765356, 2447082537,6567061364,17646783586,47498319984] |