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A278561 as a simple table

na(n)
12
23
310
47
5252
6396
76435
8858
9680680
101175720
115290740
129360540
131029659400
14617795640
15116454478140
161061790830100
17283144221360
1874511637200
1914060345939640
2014060345939640
21109530094869795600
22650075097225840
2351193413906534900
24481218090721428060

[2,3,10,7,252,396,6435,858,680680,1175720,5290740,
 9360540,1029659400,617795640,116454478140,
 1061790830100,283144221360,74511637200,
 14060345939640,14060345939640,109530094869795600,
 650075097225840,51193413906534900,
 481218090721428060]