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A283364 as a simple table

na(n)
11
22
33
44
55
66
77
89
911
1013
1117
1219
1323
1431
1561
16101
17127
18167
19199
20347

[1,2,3,4,5,6,7,9,11,13,17,19,23,31,61,101,127,167,
 199,347]