A300644 - OEIS

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A300644 as a simple table

n	a(n)
1	0
2	19
3	104
4	1789
5	28089
6	456649
7	7455411
8	121708555
9	1990954802
10	32547397369
11	532327808168
12	8705226732028
13	142365129531729
14	2328217142648763
15	38075317550124085
16	622678903591246459
17	10183203860874999028

[0,19,104,1789,28089,456649,7455411,121708555, 1990954802,32547397369,532327808168,8705226732028, 142365129531729,2328217142648763, 38075317550124085,622678903591246459, 10183203860874999028]