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A347800 as a simple table

na(n)
01
10
21
31
42
51
67
71
848
950
10796
11777
1224823
139315
141501873
152585314
16200614419
17382810931
1852597087873
1948712723680
2027115688491527

[1,0,1,1,2,1,7,1,48,50,796,777,24823,9315,1501873,
 2585314,200614419,382810931,52597087873,
 48712723680,27115688491527]