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A300125 as a simple table

na(n)
00
11
21
32
45
511
626
765
8163
9417
101086
112858
127599
1320391
1455127
15150028
16410719
171130245
183124770
198675210
2024175809
2167603633
22189633981
23533463183
241504644945
254254179693
2612055097308
2734231674486
2897392368007
29277590288931
30792528581088

[0,1,1,2,5,11,26,65,163,417,1086,2858,7599,20391,
 55127,150028,410719,1130245,3124770,8675210,
 24175809,67603633,189633981,533463183,1504644945,
 4254179693,12055097308,34231674486,97392368007,
 277590288931,792528581088]