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A182894 as a simple table

n a(n)
0 1
1 0
2 0
3 2
4 2
5 4
6 12
7 24
8 54
9 130
10 300
11 706
12 1686
13 4028
14 9686
15 23426
16 56866
17 138584
18 338940
19 831508
20 2045736
21 5046240
22 12477290
23 30919122
24 76774382
25 190995224
26 475979602
27 1188125394
28 2970282794
29 7436232760
30 18641883396
31 46792219972
32 117590713254

[1,0,0,2,2,4,12,24,54,130,300,706,1686,4028,9686,
 23426,56866,138584,338940,831508,2045736,5046240,
 12477290,30919122,76774382,190995224,475979602,
 1188125394,2970282794,7436232760,18641883396,
 46792219972,117590713254]

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Last modified April 22 06:01 EDT 2021. Contains 343161 sequences. (Running on oeis4.)