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A188541 as a simple table

n a(n)
2 1
3 0
4 1
5 1
6 2
7 2
8 4
9 5
10 9
11 14
12 24
13 40
14 70
15 120
16 211
17 371
18 658
19 1172
20 2102
21 3786
22 6856
23 12470
24 22782
25 41789
26 76947
27 142180
28 263578
29 490104
30 913858
31 1708386
32 3201290
33 6011962
34 11313274
35 21329276
36 40282947
37 76202831
38 144370582
39 273906268
40 520359324
41 989804122
42 1884992934
43 3593832942
44 6859139352
45 13104584156
46 25061042050
47 47971076906
48 91906883496

[1,0,1,1,2,2,4,5,9,14,24,40,70,120,211,371,658,
 1172,2102,3786,6856,12470,22782,41789,76947,
 142180,263578,490104,913858,1708386,3201290,
 6011962,11313274,21329276,40282947,76202831,
 144370582,273906268,520359324,989804122,
 1884992934,3593832942,6859139352,13104584156,
 25061042050,47971076906,91906883496]

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Last modified September 21 13:37 EDT 2019. Contains 327253 sequences. (Running on oeis4.)