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A218030 as a simple table

na(n)
12
25
354
4648
52160
6337169025526136832000
7685506275314921762068267522458966662115416623590907309075726336000000
846641846972427276691124922228108091690332947069125333309512419901440000000000

[2,5,54,648,2160,337169025526136832000,
 68550627531492176206826752245896666211541662359090\
 7309075726336000000,
 46641846972427276691124922228108091690332947069125\
 333309512419901440000000000]