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A005749 as a simple table

n a(n)
1 4
2 16
3 152
4 2368
5 47688
6 1156000
7 32699080
8 1057082752
9 38444581640
10 1553526946144
11 69054999618888
12 3348574955346496
13 175908582307762312
14 9951733002164182048
15 603217074746723736776
16 39001136297834245139200
17 2679228986900726147063304

[4,16,152,2368,47688,1156000,32699080,1057082752,
 38444581640,1553526946144,69054999618888,
 3348574955346496,175908582307762312,
 9951733002164182048,603217074746723736776,
 39001136297834245139200,2679228986900726147063304]

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Last modified January 27 08:31 EST 2020. Contains 331293 sequences. (Running on oeis4.)