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A000088 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 11
5 34
6 156
7 1044
8 12346
9 274668
10 12005168
11 1018997864
12 165091172592
13 50502031367952
14 29054155657235488
15 31426485969804308768
16 64001015704527557894928
17 245935864153532932683719776
18 1787577725145611700547878190848
19 24637809253125004524383007491432768

[1,1,2,4,11,34,156,1044,12346,274668,12005168,
 1018997864,165091172592,50502031367952,
 29054155657235488,31426485969804308768,
 64001015704527557894928,
 245935864153532932683719776,
 1787577725145611700547878190848,
 24637809253125004524383007491432768]

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Last modified November 20 16:53 EST 2018. Contains 317412 sequences. (Running on oeis4.)