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A354309 as a simple table

na(n)
01
10
22
36
444
5360
63744
746200
8662864
910838016
10198943200
114050937440
1290613710912
132208677328000
1458265734055424
151653914478303360
1650263564166365440
171628300694034022400
1856012708047907510784
192039053421375533094400
2078314004507947110456320

[1,0,2,6,44,360,3744,46200,662864,10838016,
 198943200,4050937440,90613710912,2208677328000,
 58265734055424,1653914478303360,50263564166365440,
 1628300694034022400,56012708047907510784,
 2039053421375533094400,78314004507947110456320]