n | a(n) |
---|---|
3 | 0 |
4 | 2 |
5 | 2 |
6 | 3 |
7 | 9 |
8 | 15 |
9 | 34 |
10 | 94 |
11 | 209 |
12 | 504 |
13 | 1306 |
14 | 3073 |
15 | 7654 |
16 | 20149 |
17 | 50226 |
18 | 130772 |
19 | 338518 |
20 | 867558 |
21 | 2257485 |
22 | 5870934 |
23 | 15278349 |
24 | 40053657 |
25 | 105184694 |
26 | 276937693 |
27 | 732156972 |
28 | 1938948436 |
29 | 5148099462 |
30 | 13701809925 |
31 | 36532372370 |
[0,2,2,3,9,15,34,94,209,504,1306,3073,7654,20149, 50226,130772,338518,867558,2257485,5870934, 15278349,40053657,105184694,276937693,732156972, 1938948436,5148099462,13701809925,36532372370] |