A305688 - OEIS

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A305688 as a simple table

n	a(n)
1	2
2	98
3	1151
4	16658
5	236246
6	3346848
7	47448563
8	672609073
9	9534641574
10	135159448496
11	1915968549513
12	27160036525020
13	385010276656849
14	5457758242174094
15	77367090794812605
16	1096726251386917869

[2,98,1151,16658,236246,3346848,47448563, 672609073,9534641574,135159448496,1915968549513, 27160036525020,385010276656849,5457758242174094, 77367090794812605,1096726251386917869]