n | a(n) |
---|---|
1 | 2 |
2 | 6 |
3 | 20 |
4 | 42 |
5 | 156 |
6 | 272 |
7 | 342 |
8 | 930 |
9 | 3660 |
10 | 7832 |
11 | 11342 |
12 | 16002 |
13 | 270920 |
14 | 367842 |
15 | 1634562 |
16 | 4851006 |
17 | 5200680 |
18 | 10345872 |
19 | 18083756 |
20 | 19558506 |
21 | 93867032 |
22 | 98813540 |
23 | 125720156 |
24 | 397464032 |
25 | 470911700 |
26 | 538634472 |
27 | 1979938512 |
28 | 7437768806 |
29 | 12210802506 |
[2,6,20,42,156,272,342,930,3660,7832,11342,16002, 270920,367842,1634562,4851006,5200680,10345872, 18083756,19558506,93867032,98813540,125720156, 397464032,470911700,538634472,1979938512, 7437768806,12210802506] |