n | a(n) |
---|---|
0 | 0 |
1 | 4 |
2 | 36 |
3 | 232 |
4 | 1300 |
5 | 6744 |
6 | 33320 |
7 | 159184 |
8 | 742068 |
9 | 3395320 |
10 | 15308920 |
11 | 68213424 |
12 | 300999816 |
13 | 1317415792 |
14 | 5726300880 |
15 | 24742452128 |
16 | 106357582324 |
17 | 455122855224 |
18 | 1939780103768 |
19 | 8238185701360 |
20 | 34876073003352 |
21 | 147223869286736 |
22 | 619871651308336 |
23 | 2603757232133472 |
24 | 10913483674589000 |
[0,4,36,232,1300,6744,33320,159184,742068,3395320, 15308920,68213424,300999816,1317415792,5726300880, 24742452128,106357582324,455122855224, 1939780103768,8238185701360,34876073003352, 147223869286736,619871651308336,2603757232133472, 10913483674589000] |