n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 9 |
4 | 21 |
5 | 48 |
6 | 108 |
7 | 240 |
8 | 528 |
9 | 1152 |
10 | 2496 |
11 | 5376 |
12 | 11520 |
13 | 24576 |
14 | 52224 |
15 | 110592 |
16 | 233472 |
17 | 491520 |
18 | 1032192 |
19 | 2162688 |
20 | 4521984 |
21 | 9437184 |
22 | 19660800 |
23 | 40894464 |
24 | 84934656 |
25 | 176160768 |
26 | 364904448 |
27 | 754974720 |
28 | 1560281088 |
29 | 3221225472 |
[1,1,4,9,21,48,108,240,528,1152,2496,5376,11520, 24576,52224,110592,233472,491520,1032192,2162688, 4521984,9437184,19660800,40894464,84934656, 176160768,364904448,754974720,1560281088, 3221225472] |