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A153950 as a simple table

n a(n)
0 1
1 2
2 2
3 4
4 11
5 16
6 47
7 268
8 865
9 4671
10 46197
11 216961
12 1952323
13 31953148
14 252461942
15 3687648150
16 101320234793

[1,2,2,4,11,16,47,268,865,4671,46197,216961,
 1952323,31953148,252461942,3687648150,
 101320234793]

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Last modified October 23 17:37 EDT 2020. Contains 337969 sequences. (Running on oeis4.)