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A356504 as a simple table

na(n)
01
14
284
32568
494390
53863496
6169713208
77836945872
8375608185758
918527792412380
10935129979113044
1148088668037229040
122511680568602631894
13132918633258508425944
147113508747197660153120
15384416086900675623039520
1620951080869890118976964642

[1,4,84,2568,94390,3863496,169713208,7836945872,
 375608185758,18527792412380,935129979113044,
 48088668037229040,2511680568602631894,
 132918633258508425944,7113508747197660153120,
 384416086900675623039520,
 20951080869890118976964642]