A183604 - OEIS

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A183604 as a simple table

n	a(n)
0	1
1	1
2	3
3	13
4	109
5	1041
6	14191
7	236293
8	4712793
9	113061889
10	3149562331
11	100617526461
12	3660463878853
13	149772851618833
14	6831434952176199
15	345197855050549621
16	19198332224485686961
17	1168264651674879727233

[1,1,3,13,109,1041,14191,236293,4712793,113061889, 3149562331,100617526461,3660463878853, 149772851618833,6831434952176199, 345197855050549621,19198332224485686961, 1168264651674879727233]