n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 20 |
3 | 65 |
4 | 190 |
5 | 506 |
6 | 1265 |
7 | 2990 |
8 | 6765 |
9 | 14725 |
10 | 31027 |
11 | 63505 |
12 | 126730 |
13 | 247170 |
14 | 472295 |
15 | 885723 |
16 | 1633000 |
17 | 2963840 |
18 | 5302075 |
19 | 9358470 |
20 | 16313440 |
21 | 28107365 |
22 | 47902010 |
23 | 80803485 |
24 | 134992865 |
25 | 223474667 |
26 | 366772720 |
27 | 597049255 |
28 | 964375855 |
29 | 1546208695 |
30 | 2461649861 |
31 | 3892774130 |
[1,5,20,65,190,506,1265,2990,6765,14725,31027, 63505,126730,247170,472295,885723,1633000,2963840, 5302075,9358470,16313440,28107365,47902010, 80803485,134992865,223474667,366772720,597049255, 964375855,1546208695,2461649861,3892774130] |