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A249650 as a simple table

na(n)
00
13
24
311
414
576
6911
72218
82654
922527
10134917
11352490
12448005
13706886
14886953
1511602049
1612183305
1733156386
18109135016
19159804680
201561954166
211930377863
223406296121
2350262652304

[0,3,4,11,14,76,911,2218,2654,22527,134917,352490,
 448005,706886,886953,11602049,12183305,33156386,
 109135016,159804680,1561954166,1930377863,
 3406296121,50262652304]