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A012388 as a simple table

na(n)
00
12
216
3392
421376
52117792
6333550336
776433892992
823981418704896
99862199971860992
105144452992189485056
113317894031273853601792
122591931617534673513250816
132411532576645611695219515392

[0,2,16,392,21376,2117792,333550336,76433892992,
 23981418704896,9862199971860992,
 5144452992189485056,3317894031273853601792,
 2591931617534673513250816,
 2411532576645611695219515392]