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A004041 as a simple table

na(n)
01
14
223
3176
41689
519524
6264207
74098240
871697105
91396704420
1029985521895
11703416314160
1217901641997225
13491250187505700
1414459713484342175
15454441401368236800
1615188465029114325025
17537928935889764226500

[1,4,23,176,1689,19524,264207,4098240,71697105,
 1396704420,29985521895,703416314160,
 17901641997225,491250187505700,14459713484342175,
 454441401368236800,15188465029114325025,
 537928935889764226500]