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A011816 as a simple table

na(n)
00
10
20
30
40
50
60
70
81
9221
1029745
113204423
12307002944
1327599253281
142402068598621
15206421946595193
1617745023547769043
171539711485029843466
18135701086522090847679
1912203103757932310440888

[0,0,0,0,0,0,0,0,1,221,29745,3204423,307002944,
 27599253281,2402068598621,206421946595193,
 17745023547769043,1539711485029843466,
 135701086522090847679,12203103757932310440888]