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A186262 as a simple table

na(n)
01
12
29
356
4420
53564
633033
7327184
83413124
937119160
10417733316
114837527072
1257397642640
13695394516600
148579210711625
15107541060458400
161367139314643300
1717599273282621800
18229116465142280100
193013124257920348000
2039991185556010816400

[1,2,9,56,420,3564,33033,327184,3413124,37119160,
 417733316,4837527072,57397642640,695394516600,
 8579210711625,107541060458400,1367139314643300,
 17599273282621800,229116465142280100,
 3013124257920348000,39991185556010816400]