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A012571 as a simple table

na(n)
00
12
28
3152
46848
5554912
670690688
713009484672
83265063958528
91071643508306432
10445538702940858368
11228823524775428872192
12142264706412727018078208
13105297877340452669962493952

[0,2,8,152,6848,554912,70690688,13009484672,
 3265063958528,1071643508306432,445538702940858368,
 228823524775428872192,142264706412727018078208,
 105297877340452669962493952]