n | a(n) |
---|---|
0 | 1 |
1 | 6 |
2 | 24 |
3 | 84 |
4 | 276 |
5 | 876 |
6 | 2724 |
7 | 8364 |
8 | 25476 |
9 | 77196 |
10 | 233124 |
11 | 702444 |
12 | 2113476 |
13 | 6352716 |
14 | 19082724 |
15 | 57297324 |
16 | 171990276 |
17 | 516167436 |
18 | 1548895524 |
19 | 4647473004 |
20 | 13943991876 |
21 | 41835121356 |
22 | 125511655524 |
23 | 376547549484 |
24 | 1129667814276 |
25 | 3389053774476 |
26 | 10167261986724 |
27 | 30501987286764 |
[1,6,24,84,276,876,2724,8364,25476,77196,233124, 702444,2113476,6352716,19082724,57297324, 171990276,516167436,1548895524,4647473004, 13943991876,41835121356,125511655524,376547549484, 1129667814276,3389053774476,10167261986724, 30501987286764] |