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A087130 as a simple table

n a(n)
0 2
1 5
2 27
3 140
4 727
5 3775
6 19602
7 101785
8 528527
9 2744420
10 14250627
11 73997555
12 384238402
13 1995189565
14 10360186227
15 53796120700
16 279340789727
17 1450500069335
18 7531841136402
19 39109705751345
20 203080369893127

[2,5,27,140,727,3775,19602,101785,528527,2744420,
 14250627,73997555,384238402,1995189565,
 10360186227,53796120700,279340789727,
 1450500069335,7531841136402,39109705751345,
 203080369893127]

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Last modified October 23 05:13 EDT 2018. Contains 316519 sequences. (Running on oeis4.)