n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 4 |
3 | 0 |
4 | 36 |
5 | 25 |
6 | 364 |
7 | 441 |
8 | 3876 |
9 | 6561 |
10 | 43779 |
11 | 91839 |
12 | 513900 |
13 | 1245699 |
14 | 6201199 |
15 | 16645750 |
16 | 76379940 |
17 | 220760742 |
18 | 955328863 |
19 | 2916666288 |
20 | 12090544611 |
21 | 38466060066 |
22 | 154437142545 |
23 | 506976137710 |
24 | 1987270052460 |
25 | 6681958793775 |
26 | 25724578443321 |
27 | 88104794553729 |
[1,0,4,0,36,25,364,441,3876,6561,43779,91839, 513900,1245699,6201199,16645750,76379940, 220760742,955328863,2916666288,12090544611, 38466060066,154437142545,506976137710, 1987270052460,6681958793775,25724578443321, 88104794553729] |