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A304067 as a simple table

n a(n)
1 0
2 0
3 1
4 3
5 9
6 27
7 79
8 233
9 679
10 1987
11 5784
12 16864
13 49063
14 142821
15 415439
16 1208761
17 3516475
18 10232428
19 29778138
20 86682119
21 252382445
22 735040515
23 2141319946
24 6239913801
25 18188637903
26 53033228465
27 154674931182
28 451247206423

[0,0,1,3,9,27,79,233,679,1987,5784,16864,49063,
 142821,415439,1208761,3516475,10232428,29778138,
 86682119,252382445,735040515,2141319946,
 6239913801,18188637903,53033228465,154674931182,
 451247206423]

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Last modified April 22 07:26 EDT 2021. Contains 343163 sequences. (Running on oeis4.)