n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 3 |
4 | 9 |
5 | 45 |
6 | 225 |
7 | 1574 |
8 | 11017 |
9 | 98702 |
10 | 887795 |
11 | 9657563 |
12 | 106067481 |
13 | 1353914186 |
14 | 17550071995 |
15 | 256827579219 |
16 | 3835324609489 |
17 | 63272134122021 |
18 | 1069057522350991 |
19 | 19628634717955199 |
20 | 370023070383398685 |
21 | 7484704516983935936 |
22 | 155675234416541005945 |
[1,1,1,3,9,45,225,1574,11017,98702,887795,9657563, 106067481,1353914186,17550071995,256827579219, 3835324609489,63272134122021,1069057522350991, 19628634717955199,370023070383398685, 7484704516983935936,155675234416541005945] |