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A025599 as a simple table

na(n)
01
12
212
364
4404
52352
614396
785608
8517796
93100928
1018678652
11112130536
12674473028
134052292096
1424363059260
15146416625608
16880136072420
175289934135040
1831796930379452
19191117281480168
201148752620931652
216904721644495296
2241502080416224764

[1,2,12,64,404,2352,14396,85608,517796,3100928,
 18678652,112130536,674473028,4052292096,
 24363059260,146416625608,880136072420,
 5289934135040,31796930379452,191117281480168,
 1148752620931652,6904721644495296,
 41502080416224764]