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A068402 as a simple table

na(n)
14
26
332
438
554
656
784
8278
92664
1010944
1115608
1220720
1384800
14179576
15209664
166251904
1785505600
18125226624
19584003328
2019018936320
2120534891040
2279185129984
2387065548800
24191904215040
25964494300024

[4,6,32,38,54,56,84,278,2664,10944,15608,20720,
 84800,179576,209664,6251904,85505600,125226624,
 584003328,19018936320,20534891040,79185129984,
 87065548800,191904215040,964494300024]