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A262543 as a simple table

n a(n)
1 0
2 2
3 4
4 10
5 28
6 84
7 264
8 858
9 2860
10 9724
11 33592
12 117572
13 416024
14 1485800
15 5348880
16 19389690
17 70715340
18 259289580
19 955277400
20 3534526380
21 13128240840
22 48932534040
23 182965127280
24 686119227300
25 2579808294648
26 9723892802904
27 36734706144304
28 139067101832008
29 527495903500720

[0,2,4,10,28,84,264,858,2860,9724,33592,117572,
 416024,1485800,5348880,19389690,70715340,
 259289580,955277400,3534526380,13128240840,
 48932534040,182965127280,686119227300,
 2579808294648,9723892802904,36734706144304,
 139067101832008,527495903500720]

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Last modified March 19 18:49 EDT 2019. Contains 321330 sequences. (Running on oeis4.)