n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 4 |
4 | 28 |
5 | 277 |
6 | 3532 |
7 | 55093 |
8 | 1016011 |
9 | 21624349 |
10 | 521677954 |
11 | 14067076336 |
12 | 419272679677 |
13 | 13687252717378 |
14 | 485693076265273 |
15 | 18614089207916707 |
16 | 766238746685395879 |
17 | 33717600627620246296 |
18 | 1579453179468556700596 |
19 | 78472105193521600210579 |
20 | 4121555441689179298651888 |
[1,1,4,28,277,3532,55093,1016011,21624349, 521677954,14067076336,419272679677,13687252717378, 485693076265273,18614089207916707, 766238746685395879,33717600627620246296, 1579453179468556700596,78472105193521600210579, 4121555441689179298651888] |