n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 7 |
4 | 42 |
5 | 376 |
6 | 4513 |
7 | 68090 |
8 | 1238968 |
9 | 26416729 |
10 | 646140364 |
11 | 17837852044 |
12 | 548713088399 |
13 | 18612963873492 |
14 | 690271321314292 |
15 | 27785827303491579 |
16 | 1206582732097720126 |
17 | 56224025231569020724 |
18 | 2798445211000659147033 |
19 | 148178324442139816854902 |
20 | 8317074395027724691495980 |
[1,1,2,7,42,376,4513,68090,1238968,26416729, 646140364,17837852044,548713088399,18612963873492, 690271321314292,27785827303491579, 1206582732097720126,56224025231569020724, 2798445211000659147033,148178324442139816854902, 8317074395027724691495980] |