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A144655 as a simple table

na(n)
01
12
21
31
46
54
620
75
870
956
10504
11420
124620
133960
143432
153003
1690090
1780080
181361360
19408408
20369512
2167184
22470288
231293292
2429745716
2527457584
26228813200
27212469400
285736673800
295354228880
30155272637520
31145568097675
32273491577450
33257403837600

[1,2,1,1,6,4,20,5,70,56,504,420,4620,3960,3432,
 3003,90090,80080,1361360,408408,369512,67184,
 470288,1293292,29745716,27457584,228813200,
 212469400,5736673800,5354228880,155272637520,
 145568097675,273491577450,257403837600]