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A334991 as a simple table

na(n)
04
158
2988
317560
4315184
55669728
6102040768
71836676480
833059947264
9595078133248
1010711402728448
11192805234432000
123470494161055744
1362468894664122368
141124440103014678528
1520239921850506117120
16364318593294077722624
176557734679233269465088
18118039224225958332203008

[4,58,988,17560,315184,5669728,102040768,
 1836676480,33059947264,595078133248,
 10711402728448,192805234432000,3470494161055744,
 62468894664122368,1124440103014678528,
 20239921850506117120,364318593294077722624,
 6557734679233269465088,118039224225958332203008]