n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 10 |
4 | 38 |
5 | 123 |
6 | 493 |
7 | 1807 |
8 | 7496 |
9 | 29400 |
10 | 125564 |
11 | 514621 |
12 | 2245001 |
13 | 9488604 |
14 | 42075089 |
15 | 181941417 |
16 | 817228089 |
17 | 3596501357 |
18 | 16322969441 |
19 | 72842426204 |
20 | 333437372040 |
21 | 1504895912513 |
22 | 6938137755904 |
23 | 31607538219604 |
24 | 146610789828190 |
25 | 673159600610476 |
26 | 3138793839304676 |
27 | 14508091716818350 |
[1,1,4,10,38,123,493,1807,7496,29400,125564, 514621,2245001,9488604,42075089,181941417, 817228089,3596501357,16322969441,72842426204, 333437372040,1504895912513,6938137755904, 31607538219604,146610789828190,673159600610476, 3138793839304676,14508091716818350] |