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A064190 as a simple table

na(n)
01
12
26
316
448
572
6272
7816
81440
91440
107936
1123808
1244352
1357600
1443200
15353792
161061376
172027520
182903040
193024000
201814400
2122368256
2267104768
23129964032
24195379200
25232243200
26203212800
27101606400
281903757312
295711271936

[1,2,6,16,48,72,272,816,1440,1440,7936,23808,
 44352,57600,43200,353792,1061376,2027520,2903040,
 3024000,1814400,22368256,67104768,129964032,
 195379200,232243200,203212800,101606400,
 1903757312,5711271936]