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A148076 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 9
5 21
6 61
7 174
8 529
9 1641
10 5095
11 16033
12 53457
13 179040
14 611600
15 2114005
16 7286191
17 25434141
18 90624740
19 324820786
20 1175997883
21 4277780903
22 15565099278
23 57172451188
24 211915699815
25 789384452140
26 2957220530771
27 11099880354961
28 41758569166532
29 158093763382620
30 601507196523586
31 2297362832884187

[1,1,2,4,9,21,61,174,529,1641,5095,16033,53457,
 179040,611600,2114005,7286191,25434141,90624740,
 324820786,1175997883,4277780903,15565099278,
 57172451188,211915699815,789384452140,
 2957220530771,11099880354961,41758569166532,
 158093763382620,601507196523586,2297362832884187]

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Last modified April 5 11:59 EDT 2020. Contains 333241 sequences. (Running on oeis4.)