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A084326 as a simple table

na(n)
00
11
26
332
4168
5880
64608
724128
8126336
9661504
103463680
1118136064
1294961664
13497225728
142603507712
1513632143360
1671378829312
17373744402432
181956951097344
1910246728974336
2053652569456640
21280928500842496
221470960727228416
237702050360000512
2440328459251089408

[0,1,6,32,168,880,4608,24128,126336,661504,
 3463680,18136064,94961664,497225728,2603507712,
 13632143360,71378829312,373744402432,
 1956951097344,10246728974336,53652569456640,
 280928500842496,1470960727228416,7702050360000512,
 40328459251089408]