n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 10 |
4 | 40 |
5 | 138 |
6 | 565 |
7 | 2176 |
8 | 9188 |
9 | 37402 |
10 | 161792 |
11 | 683613 |
12 | 3011220 |
13 | 13056815 |
14 | 58330575 |
15 | 257707423 |
16 | 1164365165 |
17 | 5218512437 |
18 | 23796555039 |
19 | 107869829968 |
20 | 495677234473 |
21 | 2267636212604 |
22 | 10487894398833 |
23 | 48345625875368 |
24 | 224845633034712 |
25 | 1043089987843812 |
26 | 4874603254258163 |
27 | 22737124220058175 |
[1,1,4,10,40,138,565,2176,9188,37402,161792, 683613,3011220,13056815,58330575,257707423, 1164365165,5218512437,23796555039,107869829968, 495677234473,2267636212604,10487894398833, 48345625875368,224845633034712,1043089987843812, 4874603254258163,22737124220058175] |