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A171189 as a simple table

na(n)
01
18
240
3176
4752
53168
613200
754592
8224624
9920672
103762240
1115337408
1262404656
13253505184
141028426432
154167385088
1616870487440
1768237238816
18275798010400
191113973454464
204496809953248
2118142920856576
2273165420555648

[1,8,40,176,752,3168,13200,54592,224624,920672,
 3762240,15337408,62404656,253505184,1028426432,
 4167385088,16870487440,68237238816,275798010400,
 1113973454464,4496809953248,18142920856576,
 73165420555648]