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A370197 as a simple table

na(n)
10
20
30
40
55
681
7658
83830
918525
1080587
11330330
121312015
135132075
1419946915
1577383374
16300272554
171166405717
184536991655
1917671814690
2068922126879
21269127380699
221052047384687
234116712577510
2416123798186665
2563205298480275
26247959260395901
27973469705104278

[0,0,0,0,5,81,658,3830,18525,80587,330330,1312015,
 5132075,19946915,77383374,300272554,1166405717,
 4536991655,17671814690,68922126879,269127380699,
 1052047384687,4116712577510,16123798186665,
 63205298480275,247959260395901,973469705104278]