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A017524 as a simple table

na(n)
00
120736
2331776
31679616
45308416
512960000
626873856
749787136
884934656
9136048896
10207360000
11303595776
12429981696
13592240896
14796594176
151049760000
161358954496
171731891456
182176782336

[0,20736,331776,1679616,5308416,12960000,26873856,
 49787136,84934656,136048896,207360000,303595776,
 429981696,592240896,796594176,1049760000,
 1358954496,1731891456,2176782336]