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A155957 as a simple table

na(n)
01
12
264
35832
41048576
5312500000
6139314069504
786812553324672
872057594037927936
976848453272063549952
10102400000000000000000000
11166712830744247830760081408
12325619086145088897570576531456

[1,2,64,5832,1048576,312500000,139314069504,
 86812553324672,72057594037927936,
 76848453272063549952,102400000000000000000000,
 166712830744247830760081408,
 325619086145088897570576531456]