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A126297 as a simple table

na(n)
01
11
21
33
46
5390
613860
723892750
880215013340
99851050382488595280
10694858921540030774800
11344551675909308833470705200
121955049249155875335764556836119978483886656454640

[1,1,1,3,6,390,13860,23892750,80215013340,
 9851050382488595280,694858921540030774800,
 344551675909308833470705200,
 1955049249155875335764556836119978483886656454640]