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A137745 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 1
6 5
7 19
8 66
9 218
10 700
11 2218
12 6997
13 22064
14 69662
15 220395
16 699090
17 2224114
18 7098773
19 22733498
20 73048903
21 235504760 

[0,0,0,0,0,1,5,19,66,218,700,2218,6997,22064,
 69662,220395,699090,2224114,7098773,22733498,
 73048903,235504760]

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)