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A137744 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 1
5 4
6 13
7 40
8 119
9 348
10 1014
11 2966
12 8726
13 25820
14 76823
15 229814
16 691186
17 2089850
18 6351448
19 19398726
20 59525641
21 183462778 

[0,0,0,0,1,4,13,40,119,348,1014,2966,8726,25820,
 76823,229814,691186,2089850,6351448,19398726,
 59525641,183462778]

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Last modified April 24 19:31 EDT 2024. Contains 371962 sequences. (Running on oeis4.)