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A186308 as a simple table

n a(n)
3 0
4 0
5 0
6 0
7 1
8 3
9 11
10 33
11 95
12 260
13 696
14 1816
15 4659
16 11795
17 29520
18 73267
19 180485
20 442157
21 1077856
22 2617726
23 6336551
24 15299287
25 36857178
26 88635225
27 212829307
28 510416549
29 1222826994
30 2927083468
31 7001510693
32 16737477645

[0,0,0,0,1,3,11,33,95,260,696,1816,4659,11795,
 29520,73267,180485,442157,1077856,2617726,6336551,
 15299287,36857178,88635225,212829307,510416549,
 1222826994,2927083468,7001510693,16737477645]

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Last modified May 25 02:26 EDT 2022. Contains 354047 sequences. (Running on oeis4.)