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A272396 as a simple table

na(n)
01
18
240
3204
4888
53580
614648
759792
8239668
9960664
103844852
1115388808
1261571632
13246305788
14985328220
153941279788

[1,8,40,204,888,3580,14648,59792,239668,960664,
 3844852,15388808,61571632,246305788,985328220,
 3941279788]