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A000468 as a simple table

na(n)
01
112
2144
31750
423420
5303240
63641100
746113200
8575360400
97346545000
10112402762000
111351035564000
1216432451210000
13221411634520000
142657142036440000
1534327724461500000
16434157115760200000
175432127413542400000
1867405553164731000000
191053071060221172000000

[1,12,144,1750,23420,303240,3641100,46113200,
 575360400,7346545000,112402762000,1351035564000,
 16432451210000,221411634520000,2657142036440000,
 34327724461500000,434157115760200000,
 5432127413542400000,67405553164731000000,
 1053071060221172000000]