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A222552 as a simple table

na(n)
1456
21668
36220
423341
587752
6330274
71244135
84688684
917678240
1066670133
11251457191
12948433758
133577222198
1413491914845
1550884787739
16191905944304
17723728206116
182729294349873
1910292348908806
2038812294765020

[456,1668,6220,23341,87752,330274,1244135,4688684,
 17678240,66670133,251457191,948433758,3577222198,
 13491914845,50884787739,191905944304,723728206116,
 2729294349873,10292348908806,38812294765020]