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A219919 as a simple table

na(n)
121
235
3356
42563
517007
6105936
7645589
83916436
923461117
10137270726
11779937711
124302009833
1323099872468
14121161612337
15622526124553
163139050474264
1715552260613233
1875769994795381
19363254825823135
201714827926516862

[21,35,356,2563,17007,105936,645589,3916436,
 23461117,137270726,779937711,4302009833,
 23099872468,121161612337,622526124553,
 3139050474264,15552260613233,75769994795381,
 363254825823135,1714827926516862]