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A258206 as a simple table

na(n)
10
20
31
40
51
61
73
82
912
1014
1150
1297
13312
14744
152291
166186
1718714
1853793
19162565
20482416
211467094
224436536
2313594266

[0,0,1,0,1,1,3,2,12,14,50,97,312,744,2291,6186,
 18714,53793,162565,482416,1467094,4436536,
 13594266]