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A151254 as a simple table

na(n)
01
14
220
396
4480
52368
611840
758880
8294400
91468416
107342080
1136667392
12183336960
13916144128
144580720640
1522896574464
16114482872320
17572320645120
182861603225600
1914306741583872
2071533707919360
21357650927714304
221788254638571520
238941026626502656
2444705133132513280
25223522175800311808

[1,4,20,96,480,2368,11840,58880,294400,1468416,
 7342080,36667392,183336960,916144128,4580720640,
 22896574464,114482872320,572320645120,
 2861603225600,14306741583872,71533707919360,
 357650927714304,1788254638571520,8941026626502656,
 44705133132513280,223522175800311808]