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A032197 as a simple table

n a(n)
12 1
13 1
14 7
15 31
16 116
17 364
18 1038
19 2652
20 6310
21 14000
22 29414
23 58786
24 112720
25 208012
26 371516
27 643856
28 1086601
29 1789515
30 2883289
31 4552275
32 7056280
33 10752060
34 16128424
35 23841480
36 34769374
37 50067108
38 71250060
39 100276894
40 139672312

[1,1,7,31,116,364,1038,2652,6310,14000,29414,
 58786,112720,208012,371516,643856,1086601,1789515,
 2883289,4552275,7056280,10752060,16128424,
 23841480,34769374,50067108,71250060,100276894,
 139672312]

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Last modified March 20 13:18 EDT 2019. Contains 321345 sequences. (Running on oeis4.)