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A143918 as a simple table

n a(n)
0 1
1 2
2 5
3 14
4 47
5 194
6 977
7 5870
8 41099
9 328802
10 2959229
11 29592302
12 325515335
13 3906184034
14 50780392457
15 710925494414
16 10663882416227
17 170622118659650
18 2900576017214069
19 52210368309853262
20 991996997887211999
21 19839939957744240002
22 416638739112629040065

[1,2,5,14,47,194,977,5870,41099,328802,2959229,
 29592302,325515335,3906184034,50780392457,
 710925494414,10663882416227,170622118659650,
 2900576017214069,52210368309853262,
 991996997887211999,19839939957744240002,
 416638739112629040065]

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Last modified July 5 07:46 EDT 2020. Contains 335462 sequences. (Running on oeis4.)