n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 19 |
4 | 66 |
5 | 243 |
6 | 930 |
7 | 3676 |
8 | 14903 |
9 | 61584 |
10 | 258894 |
11 | 1103447 |
12 | 4758012 |
13 | 20732432 |
14 | 91124592 |
15 | 403681327 |
16 | 1800752730 |
17 | 8081803201 |
18 | 36474901389 |
19 | 165435268106 |
20 | 753751636931 |
21 | 3448465225387 |
22 | 15836193654948 |
23 | 72977234653985 |
24 | 337370456592555 |
25 | 1564255503416559 |
26 | 7272766119061584 |
27 | 33899558103994633 |
[1,2,6,19,66,243,930,3676,14903,61584,258894, 1103447,4758012,20732432,91124592,403681327, 1800752730,8081803201,36474901389,165435268106, 753751636931,3448465225387,15836193654948, 72977234653985,337370456592555,1564255503416559, 7272766119061584,33899558103994633] |