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A054185 as a simple table

n a(n)
0 1
1 3
2 8
3 20
4 49
5 119
6 290
7 714
8 1781
9 4507
10 11580
11 30208
12 79941
13 214327
14 581292
15 1592496
16 4400765
17 12251895
18 34326566
19 96694866
20 273639617
21 777444807
22 2216341466
23 6336999666
24 18165573373
25 52191551315
26 150254448730
27 433350470586

[1,3,8,20,49,119,290,714,1781,4507,11580,30208,
 79941,214327,581292,1592496,4400765,12251895,
 34326566,96694866,273639617,777444807,2216341466,
 6336999666,18165573373,52191551315,150254448730,
 433350470586]

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Last modified January 27 04:57 EST 2020. Contains 331291 sequences. (Running on oeis4.)