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A191691 as a simple table

na(n)
12
26
332
4294
54640
6125338
75802288
8459958324
962453890000
1014523496866976
115784570667981520
123945961499388113436
134610186764537663968556
149225021921428355206788506
1531615478219055162849230486428

[2,6,32,294,4640,125338,5802288,459958324,
 62453890000,14523496866976,5784570667981520,
 3945961499388113436,4610186764537663968556,
 9225021921428355206788506,
 31615478219055162849230486428]