n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 4 |
3 | 17 |
4 | 72 |
5 | 305 |
6 | 1292 |
7 | 5473 |
8 | 23184 |
9 | 98209 |
10 | 416020 |
11 | 1762289 |
12 | 7465176 |
13 | 31622993 |
14 | 133957148 |
15 | 567451585 |
16 | 2403763488 |
17 | 10182505537 |
18 | 43133785636 |
19 | 182717648081 |
20 | 774004377960 |
21 | 3278735159921 |
22 | 13888945017644 |
23 | 58834515230497 |
24 | 249227005939632 |
25 | 1055742538989025 |
[0,1,4,17,72,305,1292,5473,23184,98209,416020, 1762289,7465176,31622993,133957148,567451585, 2403763488,10182505537,43133785636,182717648081, 774004377960,3278735159921,13888945017644, 58834515230497,249227005939632,1055742538989025] |