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A019007 as a simple table

n a(n)
2 3
3 13
4 37
5 200
6 960
7 5234
8 29645
9 181949
10 1177256
11 7902692
12 53837109
13 367866717
14 2508479243
15 17078631504
16 116405435614

[3,13,37,200,960,5234,29645,181949,1177256,
 7902692,53837109,367866717,2508479243,17078631504,
 116405435614]

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Last modified January 21 03:58 EST 2022. Contains 350473 sequences. (Running on oeis4.)