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A193473 as a simple table

n a(n)
0 1
1 2
2 6
3 56
4 30
5 992
6 42
7 16256
8 30
9 261632
10 66
11 4192256
12 2730
13 67100672
14 6
15 1073709056
16 510
17 17179738112
18 798
19 274877382656
20 330
21 628292059136
22 138
23 70368735789056
24 2730
25 1125899873288192
26 6
27 18014398375264256
28 870

[1,2,6,56,30,992,42,16256,30,261632,66,4192256,
 2730,67100672,6,1073709056,510,17179738112,798,
 274877382656,330,628292059136,138,70368735789056,
 2730,1125899873288192,6,18014398375264256,870]

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Last modified August 18 20:02 EDT 2019. Contains 326109 sequences. (Running on oeis4.)