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A221002 as a simple table

na(n)
021558
1141686
2825078
34438006
422578678
5110311926
6522899958
72422104566
811019370998
949421451766
10219106574838
11962208334326
124192177750518
1318142557897206
1478066631049718
15334254292599286
161424972878709238
176051724204704246
1825614248465924598
19108086444576211446
20454863674100679158

[21558,141686,825078,4438006,22578678,110311926,
 522899958,2422104566,11019370998,49421451766,
 219106574838,962208334326,4192177750518,
 18142557897206,78066631049718,334254292599286,
 1424972878709238,6051724204704246,
 25614248465924598,108086444576211446,
 454863674100679158]