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A292476 as a simple table

n a(n)
0 1
1 0
2 2
3 2
4 8
5 20
6 68
7 206
8 692
9 2306
10 7930
11 27492
12 96792
13 343670
14 1231932
15 4447510
16 16164914
17 59086618
18 217091832
19 801247614
20 2969432270
21 11045446688
22 41224168020
23 154329373022
24 579377940390
25 2180684278698
26 8227240466520
27 31107755899600

[1,0,2,2,8,20,68,206,692,2306,7930,27492,96792,
 343670,1231932,4447510,16164914,59086618,
 217091832,801247614,2969432270,11045446688,
 41224168020,154329373022,579377940390,
 2180684278698,8227240466520,31107755899600]

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)