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A107387 as a simple table

na(n)
00
11
21
32
43
57
616
741
8105
9274
10715
111871
124896
1312817
1433553
1587842
16229971
17602071
181576240
194126649
2010803705
2128284466
2274049691
23193864607
24507544128
251328767777
263478759201
279107509826
2823843770275
2962423800999
30163427632720
31427859097161

[0,1,1,2,3,7,16,41,105,274,715,1871,4896,12817,
 33553,87842,229971,602071,1576240,4126649,
 10803705,28284466,74049691,193864607,507544128,
 1328767777,3478759201,9107509826,23843770275,
 62423800999,163427632720,427859097161]