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A190425 as a simple table

na(n)
01
12
212
360
4700
53780
651744
7288288
84247100
924066900
10369881512
112118412296
1233466634656
13193076738400
143109838832000
1518037065225600
16294718130342460
171716299700229620
1828355714001615000
19165657066009435000
202761067350729888200
2116171965911417916600

[1,2,12,60,700,3780,51744,288288,4247100,24066900,
 369881512,2118412296,33466634656,193076738400,
 3109838832000,18037065225600,294718130342460,
 1716299700229620,28355714001615000,
 165657066009435000,2761067350729888200,
 16171965911417916600]