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A172675 as a simple table

na(n)
121
22385
3352128
457775905
510060071021
61820016119376
7338183208699840
864089909936535329
912331175198408791725
102401214665364782652385
11472159936393091112404160
1293594776429965445731933200

[21,2385,352128,57775905,10060071021,
 1820016119376,338183208699840,64089909936535329,
 12331175198408791725,2401214665364782652385,
 472159936393091112404160,
 93594776429965445731933200]