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A331722 as a simple table

na(n)
01
12
27
321
466
5192
6565
71579
84348
911582
1030205
1176736
12191120
13465920
141115572
152623885
166074353
1713849021
1831137381
1969082779
20151390617
21327897173
22702426987
231489108503
243125821257
256500086120
2613396645887
2727376083598
2855490121271
29111604327066
30222798559100

[1,2,7,21,66,192,565,1579,4348,11582,30205,76736,
 191120,465920,1115572,2623885,6074353,13849021,
 31137381,69082779,151390617,327897173,702426987,
 1489108503,3125821257,6500086120,13396645887,
 27376083598,55490121271,111604327066,222798559100]