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A338586 as a simple table

n a(n)
0 1
1 1
2 0
3 0
4 0
5 1
6 2
7 5
8 5
9 20
10 35
11 75
12 154
13 336
14 730
15 1570
16 3394
17 7339
18 16085
19 35015
20 76269
21 164821
22 359704
23 782004
24 1696804
25 3668860
26 7953962
27 17184203
28 37093184
29 79825297
30 171824175
31 368838299
32 790404448
33 1690297309
34 3610816466
35 7696144659
36 16374004711
37 34766160358

[1,1,0,0,0,1,2,5,5,20,35,75,154,336,730,1570,3394,
 7339,16085,35015,76269,164821,359704,782004,
 1696804,3668860,7953962,17184203,37093184,
 79825297,171824175,368838299,790404448,1690297309,
 3610816466,7696144659,16374004711,34766160358]

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Last modified June 4 10:10 EDT 2024. Contains 373092 sequences. (Running on oeis4.)