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A025557 as a simple table

na(n)
12
22
34
44
524
624
796
8288
92880
102880
1134560
1234560
13483840
147257600
1558060800
1658060800
171045094400
181045094400
1920901888000
20438939648000
219656672256000
229656672256000
23231760134144000
241158800670720000
2530128817438720000
26271159356948480000

[2,2,4,4,24,24,96,288,2880,2880,34560,34560,
 483840,7257600,58060800,58060800,1045094400,
 1045094400,20901888000,438939648000,9656672256000,
 9656672256000,231760134144000,1158800670720000,
 30128817438720000,271159356948480000]