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A321051 as a simple table

na(n)
50
697
7744
83628
915038
1059963
11245386
121054116
134585666
1419816317
1584377528
16354143757
171472404694
186105113905
1925314316974
20105009933736
21435538239600
221804712603943
237467462109856
2430859243303779
25127410491972804
26525761755401512
272168906840165128

[0,97,744,3628,15038,59963,245386,1054116,4585666,
 19816317,84377528,354143757,1472404694,6105113905,
 25314316974,105009933736,435538239600,
 1804712603943,7467462109856,30859243303779,
 127410491972804,525761755401512,2168906840165128]