n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 3 |
4 | 10 |
5 | 27 |
6 | 76 |
7 | 214 |
8 | 599 |
9 | 1683 |
10 | 4721 |
11 | 13250 |
12 | 37183 |
13 | 104346 |
14 | 292828 |
15 | 821761 |
16 | 2306111 |
17 | 6471639 |
18 | 18161366 |
19 | 50966255 |
20 | 143026636 |
21 | 401375754 |
22 | 1126381063 |
23 | 3160963987 |
24 | 8870615501 |
25 | 24893614638 |
26 | 69858968603 |
27 | 196045273658 |
28 | 550161991984 |
[0,2,3,10,27,76,214,599,1683,4721,13250,37183, 104346,292828,821761,2306111,6471639,18161366, 50966255,143026636,401375754,1126381063, 3160963987,8870615501,24893614638,69858968603, 196045273658,550161991984] |