n | a(n) |
---|---|
-2 | 1 |
-1 | 0 |
0 | 1 |
1 | 2 |
2 | 3 |
3 | 20 |
4 | 23 |
5 | 89 |
6 | 2871 |
7 | 51767 |
8 | 158172 |
9 | 1317143 |
10 | 1475315 |
11 | 4267773 |
12 | 10010861 |
13 | 24289495 |
14 | 204326821 |
15 | 1045923600 |
16 | 2296174021 |
17 | 3342097621 |
18 | 12322466884 |
19 | 27987031389 |
20 | 40309498273 |
21 | 592320007211 |
22 | 1224949512695 |
[1,0,1,2,3,20,23,89,2871,51767,158172,1317143, 1475315,4267773,10010861,24289495,204326821, 1045923600,2296174021,3342097621,12322466884, 27987031389,40309498273,592320007211, 1224949512695] |