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A066158 as a simple table

n a(n)
1 1
2 2
3 6
4 18
5 55
6 174
7 570
8 1908
9 6473
10 22202
11 76886
12 268352
13 942651
14 3329608
15 11817582
16 42120340
17 150682450
18 540832274
19 1946892842
20 7027047848
21 25424079339
22 92185846608
23 334925007128
24 1219054432490
25 4444545298879
26 16229462702152
27 59347661054364

[1,2,6,18,55,174,570,1908,6473,22202,76886,268352,
 942651,3329608,11817582,42120340,150682450,
 540832274,1946892842,7027047848,25424079339,
 92185846608,334925007128,1219054432490,
 4444545298879,16229462702152,59347661054364]

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Last modified April 21 14:50 EDT 2021. Contains 343154 sequences. (Running on oeis4.)