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A006154 as a simple table

n a(n)
0 1
1 1
2 2
3 7
4 32
5 181
6 1232
7 9787
8 88832
9 907081
10 10291712
11 128445967
12 1748805632
13 25794366781
14 409725396992
15 6973071372547
16 126585529106432
17 2441591202059281
18 49863806091395072
19 1074927056650469527

[1,1,2,7,32,181,1232,9787,88832,907081,10291712,
 128445967,1748805632,25794366781,409725396992,
 6973071372547,126585529106432,2441591202059281,
 49863806091395072,1074927056650469527]

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Last modified October 20 02:01 EDT 2019. Contains 328244 sequences. (Running on oeis4.)