n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 21 |
7 | 71 |
8 | 183 |
9 | 2101 |
10 | 13513 |
11 | 64285 |
12 | 629949 |
13 | 5762615 |
14 | 41992107 |
15 | 427215283 |
16 | 4789958371 |
17 | 47283346849 |
18 | 540921904725 |
19 | 6980052633257 |
20 | 85901272312905 |
21 | 1129338979629643 |
22 | 16398293425501375 |
23 | 238339738265039119 |
24 | 3588600147767147775 |
25 | 58124879519314730741 |
[1,0,0,1,1,1,21,71,183,2101,13513,64285,629949, 5762615,41992107,427215283,4789958371,47283346849, 540921904725,6980052633257,85901272312905, 1129338979629643,16398293425501375, 238339738265039119,3588600147767147775, 58124879519314730741] |