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A251742 as a simple table

n a(n)
0 0
1 0
2 0
3 1
4 0
5 0
6 0
7 0
8 1
9 2
10 4
11 8
12 15
13 30
14 60
15 120
16 240
17 479
18 956
19 1908
20 3808
21 7601
22 15172
23 30284
24 60448
25 120656
26 240833
27 480710
28 959512
29 1915216
30 3822831
31 7630490
32 15230696
33 30400944
34 60681232
35 121121631
36 241762552
37 482565592
38 963215968
39 1922609105

[0,0,0,1,0,0,0,0,1,2,4,8,15,30,60,120,240,479,956,
 1908,3808,7601,15172,30284,60448,120656,240833,
 480710,959512,1915216,3822831,7630490,15230696,
 30400944,60681232,121121631,241762552,482565592,
 963215968,1922609105]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)