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A001678 as a simple table

n a(n)
0 0
1 0
2 1
3 0
4 1
5 1
6 2
7 3
8 6
9 10
10 19
11 35
12 67
13 127
14 248
15 482
16 952
17 1885
18 3765
19 7546
20 15221
21 30802
22 62620
23 127702
24 261335
25 536278
26 1103600
27 2276499
28 4706985
29 9752585
30 20247033
31 42110393
32 87733197
33 183074638
34 382599946
35 800701320
36 1677922740
37 3520581954

[0,0,1,0,1,1,2,3,6,10,19,35,67,127,248,482,952,
 1885,3765,7546,15221,30802,62620,127702,261335,
 536278,1103600,2276499,4706985,9752585,20247033,
 42110393,87733197,183074638,382599946,800701320,
 1677922740,3520581954]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)