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A247600 as a simple table

na(n)
59
67
76
8998
95
105
115
125
135
145
15636787
161617099
174124188
1810553076
195
205
21179992154
22465769460
231208198239
243140421185
255
265
275
28145935688930
295
305
315
325
335
345
355
365
375

[9,7,6,998,5,5,5,5,5,5,636787,1617099,4124188,
 10553076,5,5,179992154,465769460,1208198239,
 3140421185,5,5,5,145935688930,5,5,5,5,5,5,5,5,5]