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A337010 as a simple table

na(n)
01
14
218
392
4532
53440
624552
7191280
81612304
914597952
10141123872
111449324992
1215743376704
13180203389696
142166381979264
1527274611880704
16358690234163456
174916123783848960
1870076765972288000
191036967662211324928
2015902394743591408640

[1,4,18,92,532,3440,24552,191280,1612304,14597952,
 141123872,1449324992,15743376704,180203389696,
 2166381979264,27274611880704,358690234163456,
 4916123783848960,70076765972288000,
 1036967662211324928,15902394743591408640]