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A215671 as a simple table

na(n)
15
233
3266
42285
520779
6191808
71805253
817102403
9163588197
101579472234
1115285215141
12148721012165
131450936704024
1414171939899753
15138704092635854
161360870342842311
1713378047438110802
18131587351850270160
191296233615241467193
2012779768037591930031

[5,33,266,2285,20779,191808,1805253,17102403,
 163588197,1579472234,15285215141,148721012165,
 1450936704024,14171939899753,138704092635854,
 1360870342842311,13378047438110802,
 131587351850270160,1296233615241467193,
 12779768037591930031]