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A002529 as a simple table

n a(n)
0 0
1 0
2 2
3 6
4 18
5 46
6 146
7 460
8 1436
9 4352
10 13252
11 40532
12 124396
13 381140
14 1166708
15 3570684
16 10932274
17 33475170
18 102499334
19 313825690
20 960844358
21 2941873064
22 9007393480
23 27578681888
24 84439657768
25 258534813320
26 791574775192
27 2423623112104
28 7420586212184
29 22720153701768
30 69563959091138

[0,0,2,6,18,46,146,460,1436,4352,13252,40532,
 124396,381140,1166708,3570684,10932274,33475170,
 102499334,313825690,960844358,2941873064,
 9007393480,27578681888,84439657768,258534813320,
 791574775192,2423623112104,7420586212184,
 22720153701768,69563959091138]

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Last modified October 18 15:20 EDT 2019. Contains 328161 sequences. (Running on oeis4.)