n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 12 |
4 | 55 |
5 | 251 |
6 | 1133 |
7 | 5103 |
8 | 22990 |
9 | 103598 |
10 | 466852 |
11 | 2103796 |
12 | 9480387 |
13 | 42721676 |
14 | 192517665 |
15 | 867546829 |
16 | 3909446467 |
17 | 17617229520 |
18 | 79388930909 |
19 | 357752184782 |
20 | 1612146986543 |
21 | 7264855441424 |
22 | 32737786954481 |
23 | 147527050375071 |
24 | 664804576516400 |
25 | 2995824317191471 |
[1,3,12,55,251,1133,5103,22990,103598,466852, 2103796,9480387,42721676,192517665,867546829, 3909446467,17617229520,79388930909,357752184782, 1612146986543,7264855441424,32737786954481, 147527050375071,664804576516400,2995824317191471] |