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A055569 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1012
1113
1214
1315
1416
1517
1618
1719
1826
1927

[0,1,2,3,4,5,6,7,8,9,12,13,14,15,16,17,18,19,26,
 27]