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A055994 as a simple table

na(n)
01
116
2115
3550
42035
56292
617017
741470
892950
9194480
10384098
11722228
121301690
132261000
143801710
156210644
169887999
1715382400
1823434125
1935027850
2051456405
2174397180
22106002975
23149009250
24206859900
25283853856
26385314996
27517788040

[1,16,115,550,2035,6292,17017,41470,92950,194480,
 384098,722228,1301690,2261000,3801710,6210644,
 9887999,15382400,23434125,35027850,51456405,
 74397180,106002975,149009250,206859900,283853856,
 385314996,517788040]