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A228449 as a simple table

n a(n)
0 1
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 1
10 3
11 9
12 28
13 92
14 324
15 1217
16 4871
17 20703
18 93166
19 442542
20 2212711
21 11616735
22 63892044
23 367379253
24 2204275523
25 13776722023
26 89548693155
27 604453678799
28 4231175751597
29 30676024199079
30 230070181493096
31 1783043906571497
32 14264351252571976

[1,0,0,0,0,0,0,0,0,1,3,9,28,92,324,1217,4871,
 20703,93166,442542,2212711,11616735,63892044,
 367379253,2204275523,13776722023,89548693155,
 604453678799,4231175751597,30676024199079,
 230070181493096,1783043906571497,
 14264351252571976]

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Last modified January 28 22:35 EST 2020. Contains 331328 sequences. (Running on oeis4.)