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A154790 as a simple table

na(n)
11
22
315
430
5176
6490
7792
831185
9831820
102323520
118118264
12118114304
132841940500
143163127352
15684957390936
1660105349839666544
17471314064268398780
1852527070729108240605
1957601805366500810491219000
2023127843459154899464880444632250

[1,2,15,30,176,490,792,31185,831820,2323520,
 8118264,118114304,2841940500,3163127352,
 684957390936,60105349839666544,471314064268398780,
 52527070729108240605,57601805366500810491219000,
 23127843459154899464880444632250]