n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 12 |
4 | 15 |
5 | 80 |
6 | 208 |
7 | 273 |
8 | 1428 |
9 | 3740 |
10 | 4895 |
11 | 25632 |
12 | 67104 |
13 | 87841 |
14 | 459940 |
15 | 1204140 |
16 | 1576239 |
17 | 8253296 |
18 | 21607408 |
19 | 28284465 |
20 | 148099380 |
21 | 387729212 |
22 | 507544127 |
23 | 2657535552 |
24 | 6957518400 |
25 | 9107509825 |
26 | 47687540548 |
27 | 124847601996 |
28 | 163427632719 |
29 | 855718194320 |
30 | 2240299317520 |
[1,4,12,15,80,208,273,1428,3740,4895,25632,67104, 87841,459940,1204140,1576239,8253296,21607408, 28284465,148099380,387729212,507544127,2657535552, 6957518400,9107509825,47687540548,124847601996, 163427632719,855718194320,2240299317520] |