A163063 - OEIS

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A163063 as a simple table

n	a(n)
0	3
1	11
2	47
3	199
4	843
5	3571
6	15127
7	64079
8	271443
9	1149851
10	4870847
11	20633239
12	87403803
13	370248451
14	1568397607
15	6643838879
16	28143753123
17	119218851371
18	505019158607
19	2139295485799
20	9062201101803
21	38388099893011

[3,11,47,199,843,3571,15127,64079,271443,1149851, 4870847,20633239,87403803,370248451,1568397607, 6643838879,28143753123,119218851371,505019158607, 2139295485799,9062201101803,38388099893011]