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A248217 as a simple table

na(n)
00
16
260
3504
44080
532736
6262080
72097024
816776960
9134217216
101073740800
118589932544
1268719472640
13549755805696
144398046494720
1535184372056064
16281474976645120
172251799813554176
1818014398509219840
19144115188075331584
201152921504605798400

[0,6,60,504,4080,32736,262080,2097024,16776960,
 134217216,1073740800,8589932544,68719472640,
 549755805696,4398046494720,35184372056064,
 281474976645120,2251799813554176,
 18014398509219840,144115188075331584,
 1152921504605798400]