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A237561 as a simple table

na(n)
1316
21536
37356
436168
5175768
6848720
74121060
820050460
997225972
10471641072
112290359200
1211118632740
1353953373220
14261887194692
151271260706180
166170274480252
1729948363314372
18145366959304036
19705586332210288

[316,1536,7356,36168,175768,848720,4121060,
 20050460,97225972,471641072,2290359200,
 11118632740,53953373220,261887194692,
 1271260706180,6170274480252,29948363314372,
 145366959304036,705586332210288]