A198287 - OEIS

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A198287 as a simple table

n	a(n)
1	2
2	17
3	272
4	4667
5	80702
6	1397477
7	24207692
8	419373647
9	7265397242
10	125869473977
11	2180631250952
12	37778460128867
13	654494991508022
14	11338834542738317
15	196440265628093252
16	3403240245856247927
17	58959623892961901042

[2,17,272,4667,80702,1397477,24207692,419373647, 7265397242,125869473977,2180631250952, 37778460128867,654494991508022,11338834542738317, 196440265628093252,3403240245856247927, 58959623892961901042]