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A135755 as a simple table

na(n)
01
12
26
340
4860
563000
614714728
710562062112
822960880409360
9150300904214651680
102955814683617734854752
11174481716707875308905153664
1230905247968182392588500030233024

[1,2,6,40,860,63000,14714728,10562062112,
 22960880409360,150300904214651680,
 2955814683617734854752,
 174481716707875308905153664,
 30905247968182392588500030233024]