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A001003 as a simple table

n a(n)
0 1
1 1
2 3
3 11
4 45
5 197
6 903
7 4279
8 20793
9 103049
10 518859
11 2646723
12 13648869
13 71039373
14 372693519
15 1968801519
16 10463578353
17 55909013009
18 300159426963
19 1618362158587
20 8759309660445
21 47574827600981
22 259215937709463
23 1416461675464871

[1,1,3,11,45,197,903,4279,20793,103049,518859,
 2646723,13648869,71039373,372693519,1968801519,
 10463578353,55909013009,300159426963,
 1618362158587,8759309660445,47574827600981,
 259215937709463,1416461675464871]

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Last modified November 19 05:29 EST 2018. Contains 317333 sequences. (Running on oeis4.)