n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 2 |
4 | 7 |
5 | 30 |
6 | 157 |
7 | 972 |
8 | 6961 |
9 | 56660 |
10 | 516901 |
11 | 5225670 |
12 | 57999271 |
13 | 701216922 |
14 | 9173819257 |
15 | 129134686520 |
16 | 1946194117057 |
17 | 31268240559432 |
18 | 533506283627401 |
19 | 9634381345852650 |
20 | 183586751854827751 |
21 | 3681369418442407670 |
22 | 77492344539145388821 |
23 | 1708512949279640961732 |
[1,0,1,2,7,30,157,972,6961,56660,516901,5225670, 57999271,701216922,9173819257,129134686520, 1946194117057,31268240559432,533506283627401, 9634381345852650,183586751854827751, 3681369418442407670,77492344539145388821, 1708512949279640961732] |