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A254215 as a simple table

na(n)
13
22
312
424
570
6192
7633
82484
910554
1035054
11102520
12337948
131366804
146000028
1524951622
1694266262
17337342046
181263530794
195269371063
2023209051416
2198571237345
22383041820280
231353435250769
244542413798878
2516490190511798
2676615460665948
27434914649543770

[3,2,12,24,70,192,633,2484,10554,35054,102520,
 337948,1366804,6000028,24951622,94266262,
 337342046,1263530794,5269371063,23209051416,
 98571237345,383041820280,1353435250769,
 4542413798878,16490190511798,76615460665948,
 434914649543770]