n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 31 |
4 | 377 |
5 | 6531 |
6 | 152452 |
7 | 4619130 |
8 | 176631345 |
9 | 8334329638 |
10 | 476245005316 |
11 | 32437793281489 |
12 | 2597918907028430 |
13 | 241796318654003869 |
14 | 25886976434072903664 |
15 | 3159556047500264255868 |
16 | 436160347706069120482893 |
17 | 67621917400663695356651589 |
18 | 11700923494462411106797164208 |
[1,1,4,31,377,6531,152452,4619130,176631345, 8334329638,476245005316,32437793281489, 2597918907028430,241796318654003869, 25886976434072903664,3159556047500264255868, 436160347706069120482893, 67621917400663695356651589, 11700923494462411106797164208] |