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A018217 as a simple table

na(n)
00
14
236
3232
41300
56744
633320
7159184
8742068
93395320
1015308920
1168213424
12300999816
131317415792
145726300880
1524742452128
16106357582324
17455122855224
181939780103768
198238185701360
2034876073003352
21147223869286736
22619871651308336
232603757232133472
2410913483674589000

[0,4,36,232,1300,6744,33320,159184,742068,3395320,
 15308920,68213424,300999816,1317415792,5726300880,
 24742452128,106357582324,455122855224,
 1939780103768,8238185701360,34876073003352,
 147223869286736,619871651308336,2603757232133472,
 10913483674589000]