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A181635 as a simple table

na(n)
10
236
30
41296
515552
646656
7559872
85038848
920155392
10181398528
111451188224
126530347008
1352242776064
14391820820480
151880739938304
1614105549537280
17101559956668416
18507799783342080
193656158440062976
2025593109080440832
21131621703842267136
22921351926895869952
236317841784428822528
2433168669368251318272
25227442304239437611008

[0,36,0,1296,15552,46656,559872,5038848,20155392,
 181398528,1451188224,6530347008,52242776064,
 391820820480,1880739938304,14105549537280,
 101559956668416,507799783342080,3656158440062976,
 25593109080440832,131621703842267136,
 921351926895869952,6317841784428822528,
 33168669368251318272,227442304239437611008]