n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 6 |
3 | 25 |
4 | 96 |
5 | 361 |
6 | 1350 |
7 | 5041 |
8 | 18816 |
9 | 70225 |
10 | 262086 |
11 | 978121 |
12 | 3650400 |
13 | 13623481 |
14 | 50843526 |
15 | 189750625 |
16 | 708158976 |
17 | 2642885281 |
18 | 9863382150 |
19 | 36810643321 |
20 | 137379191136 |
21 | 512706121225 |
22 | 1913445293766 |
23 | 7141075053841 |
24 | 26650854921600 |
25 | 99462344632561 |
26 | 371198523608646 |
[0,1,6,25,96,361,1350,5041,18816,70225,262086, 978121,3650400,13623481,50843526,189750625, 708158976,2642885281,9863382150,36810643321, 137379191136,512706121225,1913445293766, 7141075053841,26650854921600,99462344632561, 371198523608646] |