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A046972 as a simple table

na(n)
12
23
37
431
5181
61621
719441
8311041
96842881
10171072001
114961088001
12153793728001
135382780480001
14252990682560001
1514420468905920001
16879648603261120001
1758056807815233920001
184586487817403479680001
19371505513209681854080001
2040122595426645640240640001

[2,3,7,31,181,1621,19441,311041,6842881,171072001,
 4961088001,153793728001,5382780480001,
 252990682560001,14420468905920001,
 879648603261120001,58056807815233920001,
 4586487817403479680001,371505513209681854080001,
 40122595426645640240640001]