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A338564 as a simple table

na(n)
31
40
51
60
70
81
92
1017
1151
12175
13827
143951
1520428
16115262
17692851
184324011
1929446302
20211048631
211623253741
2213109205113

[1,0,1,0,0,1,2,17,51,175,827,3951,20428,115262,
 692851,4324011,29446302,211048631,1623253741,
 13109205113]