n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 7 |
4 | 18 |
5 | 42 |
6 | 105 |
7 | 248 |
8 | 606 |
9 | 1450 |
10 | 3507 |
11 | 8415 |
12 | 20305 |
13 | 48785 |
14 | 117502 |
15 | 282574 |
16 | 680137 |
17 | 1636005 |
18 | 3936841 |
19 | 9470776 |
20 | 22787529 |
21 | 54822530 |
22 | 131901491 |
23 | 317336519 |
24 | 763489051 |
25 | 1836862947 |
26 | 4419324581 |
27 | 10632404189 |
28 | 25580507505 |
29 | 61543948594 |
30 | 148068421107 |
[1,1,3,7,18,42,105,248,606,1450,3507,8415,20305, 48785,117502,282574,680137,1636005,3936841, 9470776,22787529,54822530,131901491,317336519, 763489051,1836862947,4419324581,10632404189, 25580507505,61543948594,148068421107] |