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A247580 as a simple table

na(n)
22
33
48
510
66
742
816
99
1020
11110
1224
13156
1484
1530
1664
17136
1818
1920
2040

[2,3,8,10,6,42,16,9,20,110,24,156,84,30,64,136,18,
 20,40]