n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 44 |
4 | 129 |
5 | 360 |
6 | 968 |
7 | 2528 |
8 | 6448 |
9 | 16128 |
10 | 39680 |
11 | 96256 |
12 | 230656 |
13 | 546816 |
14 | 1284096 |
15 | 2990080 |
16 | 6909952 |
17 | 15859712 |
18 | 36175872 |
19 | 82051072 |
20 | 185139200 |
21 | 415760384 |
22 | 929562624 |
23 | 2069889024 |
24 | 4591714304 |
25 | 10150215680 |
26 | 22364028928 |
[1,4,14,44,129,360,968,2528,6448,16128,39680, 96256,230656,546816,1284096,2990080,6909952, 15859712,36175872,82051072,185139200,415760384, 929562624,2069889024,4591714304,10150215680, 22364028928] |