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A054264 as a simple table

na(n)
24
36
48910
512
6141516
718
8202122
92425262728
1030
113233343536
12383940
1342
14444546
154849505152
165455565758
1760
186263646566
19686970
2072
217475767778
22808182
238485868788
2490919293949596
259899100
26102
27104105106
28108
29110111112

[4,6,8910,12,141516,18,202122,2425262728,30,
 3233343536,383940,42,444546,4849505152,5455565758,
 60,6263646566,686970,72,7475767778,808182,
 8485868788,90919293949596,9899100,102,104105106,
 108,110111112]