A145041 - OEIS

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A145041 as a simple table

n	a(n)
1	5
2	17
3	89
4	521
5	4253
6	9689
7	9941
8	11213
9	19937
10	21701
11	859433
12	1398269
13	2976221
14	3021377
15	6972593
16	32582657
17	43112609
18	57885161

[5,17,89,521,4253,9689,9941,11213,19937,21701, 859433,1398269,2976221,3021377,6972593,32582657, 43112609,57885161]