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A183998 as a simple table

na(n)
1855
21233
31887
43309
56111
612525
726655
861125
9144495
10361293
11925647
122471829
136713631
1418762045
1552968255
16152326725
17440454735
181288454253
193779340207
2011166335349
2133034529151
2298175588765
23291944589855
24870672034725

[855,1233,1887,3309,6111,12525,26655,61125,144495,
 361293,925647,2471829,6713631,18762045,52968255,
 152326725,440454735,1288454253,3779340207,
 11166335349,33034529151,98175588765,291944589855,
 870672034725]