n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 22 |
3 | 136 |
4 | 886 |
5 | 5944 |
6 | 40636 |
7 | 281488 |
8 | 1968934 |
9 | 13875544 |
10 | 98365972 |
11 | 700701808 |
12 | 5011371964 |
13 | 35961808432 |
14 | 258805997752 |
15 | 1867175631136 |
16 | 13500088649734 |
17 | 97794850668952 |
18 | 709626281415076 |
19 | 5157024231645616 |
20 | 37528209137458516 |
21 | 273431636191026064 |
22 | 1994448720786816712 |
[1,4,22,136,886,5944,40636,281488,1968934, 13875544,98365972,700701808,5011371964, 35961808432,258805997752,1867175631136, 13500088649734,97794850668952,709626281415076, 5157024231645616,37528209137458516, 273431636191026064,1994448720786816712] |