n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 4 |
4 | 16 |
5 | 52 |
6 | 169 |
7 | 520 |
8 | 1600 |
9 | 4840 |
10 | 14641 |
11 | 44044 |
12 | 132496 |
13 | 397852 |
14 | 1194649 |
15 | 3585040 |
16 | 10758400 |
17 | 32278480 |
18 | 96845281 |
19 | 290545684 |
20 | 871666576 |
21 | 2615029252 |
22 | 7845176329 |
23 | 23535617560 |
24 | 70607118400 |
25 | 211821620920 |
26 | 635465659921 |
[0,1,4,16,52,169,520,1600,4840,14641,44044,132496, 397852,1194649,3585040,10758400,32278480,96845281, 290545684,871666576,2615029252,7845176329, 23535617560,70607118400,211821620920,635465659921] |