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A057413 as a simple table

n a(n)
2 1
3 2
4 5
5 14
6 42
7 132
8 430
9 1442
10 4956
11 17400
12 62251
13 226506
14 836911
15 3136182
16 11906908
17 45761338
18 177903128
19 699167112
20 2776219871
21 11132523840
22 45062497156
23 184057276510
24 758328417263
25 3150593560374
26 13195743501195

[1,2,5,14,42,132,430,1442,4956,17400,62251,226506,
 836911,3136182,11906908,45761338,177903128,
 699167112,2776219871,11132523840,45062497156,
 184057276510,758328417263,3150593560374,
 13195743501195]

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Last modified February 22 15:12 EST 2018. Contains 299454 sequences. (Running on oeis4.)