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A255015 as a simple table

na(n)
01
12
26
344
42209
5674384
6954623404
75744406453840
8144115192471496836
914925010120653819583840
106338253001142965335834871200
1110985355337065423791175013899922368
1277433143050453552587418968170813573149024

[1,2,6,44,2209,674384,954623404,5744406453840,
 144115192471496836,14925010120653819583840,
 6338253001142965335834871200,
 10985355337065423791175013899922368,
 77433143050453552587418968170813573149024]