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A133736 as a simple table

n a(n)
1 1
2 1
3 2
4 3
5 7
6 15
7 52
8 236
9 2018
10 33044
11 1181670
12 87720798
13 12886156666
14 3633055848955
15 1944000061673516
16 1967881435350411681
17 3768516013573481061951
18 13670271805989797561408684

[1,1,2,3,7,15,52,236,2018,33044,1181670,87720798,
 12886156666,3633055848955,1944000061673516,
 1967881435350411681,3768516013573481061951,
 13670271805989797561408684]

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Last modified November 21 09:14 EST 2019. Contains 329362 sequences. (Running on oeis4.)