n | a(n) |
---|---|
0 | 0 |
1 | 2 |
2 | 9 |
3 | 34 |
4 | 125 |
5 | 461 |
6 | 1715 |
7 | 6434 |
8 | 24309 |
9 | 92377 |
10 | 352715 |
11 | 1352077 |
12 | 5200299 |
13 | 20058299 |
14 | 77558759 |
15 | 300540194 |
16 | 1166803109 |
17 | 4537567649 |
18 | 17672631899 |
19 | 68923264409 |
20 | 269128937219 |
21 | 1052049481859 |
22 | 4116715363799 |
23 | 16123801841549 |
24 | 63205303218875 |
25 | 247959266474051 |
[0,2,9,34,125,461,1715,6434,24309,92377,352715, 1352077,5200299,20058299,77558759,300540194, 1166803109,4537567649,17672631899,68923264409, 269128937219,1052049481859,4116715363799, 16123801841549,63205303218875,247959266474051] |