n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 36 |
4 | 180 |
5 | 752 |
6 | 3760 |
7 | 16736 |
8 | 83680 |
9 | 385344 |
10 | 1926720 |
11 | 9058512 |
12 | 45292560 |
13 | 215891600 |
14 | 1079458000 |
15 | 5195196624 |
16 | 25975983120 |
17 | 125901336112 |
18 | 629506680560 |
19 | 3067403607504 |
20 | 15337018037520 |
21 | 75041661844720 |
22 | 375208309223600 |
23 | 1841832138224720 |
24 | 9209160691123600 |
25 | 45324878456036464 |
26 | 226624392280182320 |
[1,2,10,36,180,752,3760,16736,83680,385344, 1926720,9058512,45292560,215891600,1079458000, 5195196624,25975983120,125901336112,629506680560, 3067403607504,15337018037520,75041661844720, 375208309223600,1841832138224720,9209160691123600, 45324878456036464,226624392280182320] |