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A357666 as a simple table

na(n)
00
11
24
320
4160
51872
625024
7348224
85055488
978571776
101332573184
1124695206912
12493816963072
1310492449771520
14234399640633344
155480635606908928
16134015043318054912
173427700843478056960
1891642829715498336256
192556218693498006929408

[0,1,4,20,160,1872,25024,348224,5055488,78571776,
 1332573184,24695206912,493816963072,
 10492449771520,234399640633344,5480635606908928,
 134015043318054912,3427700843478056960,
 91642829715498336256,2556218693498006929408]