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A111276 as a simple table

n a(n)
1 0
2 0
3 0
4 0
5 0
6 4
7 14
8 60
9 210
10 728
11 2442
12 8252
13 27716
14 93924
15 319964
16 1098900
17 3800928
18 13244836
19 46460738
20 164015272
21 582353976
22 2078812492

[0,0,0,0,0,4,14,60,210,728,2442,8252,27716,93924,
 319964,1098900,3800928,13244836,46460738,
 164015272,582353976,2078812492]

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Last modified April 5 00:43 EDT 2020. Contains 333238 sequences. (Running on oeis4.)