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A161408 as a simple table

na(n)
01
10
21
32
46
517
656
7179
8607
92076
107269
1125736
1292360
13334506
141222463
154499892
1616673446
1762130710
18232700539
19875483029
203307244256
2112539455600
2247702381244
23182021195608
24696487788847
252671877845634
2610274126646175
2739593295985708
28152889766657797

[1,0,1,2,6,17,56,179,607,2076,7269,25736,92360,
 334506,1222463,4499892,16673446,62130710,
 232700539,875483029,3307244256,12539455600,
 47702381244,182021195608,696487788847,
 2671877845634,10274126646175,39593295985708,
 152889766657797]