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A279854 as a simple table

na(n)
18
254
3557
45200
544893
6373516
73010179
823836450
9185854745
101432781380
1110940440805
1282884481996
13623764753929
144667668549882
1534757207667097
16257707173342548
171903562116898937
1814013650638972172
19102857118300106915

[8,54,557,5200,44893,373516,3010179,23836450,
 185854745,1432781380,10940440805,82884481996,
 623764753929,4667668549882,34757207667097,
 257707173342548,1903562116898937,
 14013650638972172,102857118300106915]