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A262067 as a simple table

na(n)
12
24
326
4240
52882
642560
7745418
815097600
9347066882
108926258176
11253930611002
127916100448256
13268352394448322
149828088361009152
15386707997366768618
1616268790735900180480
17728714136550643404802
1834624041592426892361728

[2,4,26,240,2882,42560,745418,15097600,347066882,
 8926258176,253930611002,7916100448256,
 268352394448322,9828088361009152,
 386707997366768618,16268790735900180480,
 728714136550643404802,34624041592426892361728]