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A258523 as a simple table

na(n)
1512
216473
3523716
46505920
565947572
6592438330
76279181504
890536765981
9940469384118
1013154653966188
11268158250039108
122752663543823279
1339677268013710316
143474369295264994411
1523501492053909210974

[512,16473,523716,6505920,65947572,592438330,
 6279181504,90536765981,940469384118,
 13154653966188,268158250039108,2752663543823279,
 39677268013710316,3474369295264994411,
 23501492053909210974]