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A294452 as a simple table

na(n)
00
11
24
316
464
5256
61024
74096
816320
964512
10252416
11976896
123740928
1314186496
1453330944
15198946816
16737156096
172715254784
189949593600
1936292198400
20131845099520
21477257695232
221722054197248
236195670220800
2422233100238848
2579595401641984
26284344067424256
271013792167690240

[0,1,4,16,64,256,1024,4096,16320,64512,252416,
 976896,3740928,14186496,53330944,198946816,
 737156096,2715254784,9949593600,36292198400,
 131845099520,477257695232,1722054197248,
 6195670220800,22233100238848,79595401641984,
 284344067424256,1013792167690240]