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A274669 as a simple table

na(n)
01
18
2138
32960
470090
51756608
645678864
71219013664
833162009210
9915589703600
1025578044554348
11721420319128704
1220509529725235824
13586986330979489280
1416895932626393943680
15488743896405192037440
1614198840150264907505050
17414069243091986225102480
1812115901803035178006468500

[1,8,138,2960,70090,1756608,45678864,1219013664,
 33162009210,915589703600,25578044554348,
 721420319128704,20509529725235824,
 586986330979489280,16895932626393943680,
 488743896405192037440,14198840150264907505050,
 414069243091986225102480,
 12115901803035178006468500]