n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 77 |
4 | 372 |
5 | 1915 |
6 | 10481 |
7 | 60814 |
8 | 372939 |
9 | 2409837 |
10 | 16360786 |
11 | 116393205 |
12 | 865549453 |
13 | 6713065156 |
14 | 54190360453 |
15 | 454442481041 |
16 | 3952241526188 |
17 | 35590085232519 |
18 | 331362825860749 |
19 | 3185554606447814 |
20 | 31581598272055879 |
21 | 322516283206446897 |
[1,4,17,77,372,1915,10481,60814,372939,2409837, 16360786,116393205,865549453,6713065156, 54190360453,454442481041,3952241526188, 35590085232519,331362825860749,3185554606447814, 31581598272055879,322516283206446897] |