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A057268 as a simple table

na(n)
01
13
26
318
4216
542768
61819863936
73311826913612597248
810968197499701667312529793029329125376
9120301356392461906290006219878693096559247086148184247242087281541542576128

[1,3,6,18,216,42768,1819863936,
 3311826913612597248,
 10968197499701667312529793029329125376,
 12030135639246190629000621987869309655924708614818\
 4247242087281541542576128]