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A000220 as a simple table

n a(n)
1 1
2 0
3 0
4 0
5 0
6 0
7 1
8 1
9 3
10 6
11 15
12 29
13 67
14 139
15 310
16 667
17 1480
18 3244
19 7241
20 16104
21 36192
22 81435
23 184452
24 418870
25 955860
26 2187664
27 5025990
28 11580130
29 26765230
30 62027433
31 144133676
32 335731381
33 783859852
34 1834104934
35 4300433063
36 10102854473
37 23778351222

[1,0,0,0,0,0,1,1,3,6,15,29,67,139,310,667,1480,
 3244,7241,16104,36192,81435,184452,418870,955860,
 2187664,5025990,11580130,26765230,62027433,
 144133676,335731381,783859852,1834104934,
 4300433063,10102854473,23778351222]

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Last modified May 4 20:57 EDT 2024. Contains 372257 sequences. (Running on oeis4.)