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A337409 as a simple table

na(n)
10
20
30
40
50
60
70
83
974
100
110
1215
1310704
1411158298
150
160
1745
18345640
194825452718593
20314824408633217132928
210
220
23105
245062600
2548038354542204960
2638491882659952177472606694634030116
27136221825854745676076981182469325427379054390050209792
280

[0,0,0,0,0,0,0,3,74,0,0,15,10704,11158298,0,0,45,
 345640,4825452718593,314824408633217132928,0,0,
 105,5062600,48038354542204960,
 38491882659952177472606694634030116,
 13622182585474567607698118246932542737905439005020\
 9792,0]