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A085449 as a simple table

n a(n)
0 0
1 1
2 2
3 8
4 24
5 80
6 256
7 832
8 2688
9 8704
10 28160
11 91136
12 294912
13 954368
14 3088384
15 9994240
16 32342016
17 104660992
18 338690048
19 1096024064
20 3546808320
21 11477712896
22 37142659072
23 120196169728
24 388962975744
25 1258710630400

[0,1,2,8,24,80,256,832,2688,8704,28160,91136,
 294912,954368,3088384,9994240,32342016,104660992,
 338690048,1096024064,3546808320,11477712896,
 37142659072,120196169728,388962975744,
 1258710630400]

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Last modified December 13 03:41 EST 2019. Contains 329968 sequences. (Running on oeis4.)