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A376072 as a simple table

na(n)
21
34
418
568
6251
7888
83076
910456
1035061
11116252
12381974
131245564
144035631
1513003696
1641701512
17133175792
18423741161
191343864820
204249518490
2113402327540
2242168298851
23132388845224
24414818381708
251297410683208
264051098663901
2712629895834508
2839319487031966
29122247859681196

[1,4,18,68,251,888,3076,10456,35061,116252,381974,
 1245564,4035631,13003696,41701512,133175792,
 423741161,1343864820,4249518490,13402327540,
 42168298851,132388845224,414818381708,
 1297410683208,4051098663901,12629895834508,
 39319487031966,122247859681196]