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A238053 as a simple table

na(n)
1618752
236751872
32246142916
4138587835304
58592543470668
6534423833189632
733030647028012904
82034659369169605752
9126176785028850855392
107850115411967418863184
11485285595640102070586096

[618752,36751872,2246142916,138587835304,
 8592543470668,534423833189632,33030647028012904,
 2034659369169605752,126176785028850855392,
 7850115411967418863184,485285595640102070586096]