n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 26 |
5 | 130 |
6 | 785 |
7 | 5497 |
8 | 43983 |
9 | 395847 |
10 | 3958473 |
11 | 43543211 |
12 | 522518536 |
13 | 6792740972 |
14 | 95098373611 |
15 | 1426475604177 |
16 | 22823609666834 |
17 | 388001364336187 |
18 | 6984024558051373 |
19 | 132696466602976097 |
20 | 2653929332059521943 |
[1,2,6,26,130,785,5497,43983,395847,3958473, 43543211,522518536,6792740972,95098373611, 1426475604177,22823609666834,388001364336187, 6984024558051373,132696466602976097, 2653929332059521943] |