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A155602 as a simple table

na(n)
01
16
224
390
4336
51266
64824
718570
872096
9281826
101107624
114371450
1217308656
1368703186
14273218424
151088090730
164338014016
1717309009346
1869106897224
19276040168410
201102998412176
214408506864306
2217623567104024
2370462887356490

[1,6,24,90,336,1266,4824,18570,72096,281826,
 1107624,4371450,17308656,68703186,273218424,
 1088090730,4338014016,17309009346,69106897224,
 276040168410,1102998412176,4408506864306,
 17623567104024,70462887356490]