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A250712 as a simple table

na(n)
138431
2735523
311250902
4133888216
51325146542
611455263558
789662106062
8650918690817
94462173467035
1029230230318745
11184726178618986
121133900834827118
136798098325193849
1439976870334808759
15231385881514622327

[38431,735523,11250902,133888216,1325146542,
 11455263558,89662106062,650918690817,
 4462173467035,29230230318745,184726178618986,
 1133900834827118,6798098325193849,
 39976870334808759,231385881514622327]