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A025547 as a simple table

na(n)
11
23
315
4105
5315
63465
745045
845045
9765765
1014549535
1114549535
12334639305
131673196525
145019589575
15145568097675
164512611027925
174512611027925
184512611027925
19166966608033225
20166966608033225
216845630929362225
22294362129962575675
23294362129962575675

[1,3,15,105,315,3465,45045,45045,765765,14549535,
 14549535,334639305,1673196525,5019589575,
 145568097675,4512611027925,4512611027925,
 4512611027925,166966608033225,166966608033225,
 6845630929362225,294362129962575675,
 294362129962575675]