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A027695 as a simple table

na(n)
01
12
24
312
432
5120
6288
71512
84096
915552
1048000
11240064
12552960
133439800
149483264
1535640000
16134217728
17673699800
181451188224
199644765256
2023685120000
21115605729792
22401556013056
231996264531840
244566087106560
2526244000000000
2689961392102400
27356237685227520

[1,2,4,12,32,120,288,1512,4096,15552,48000,240064,
 552960,3439800,9483264,35640000,134217728,
 673699800,1451188224,9644765256,23685120000,
 115605729792,401556013056,1996264531840,
 4566087106560,26244000000000,89961392102400,
 356237685227520]