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A155714 as a simple table

na(n)
13
212
336
4144
5144
64356
74356
84356
97056
1017424
11176400
122547216
132547216
146290064
156780816
166780816
176780816
186780816
1993315600
2093315600
21271986064
22271986064
23271986064
24271986064
25271986064
26308213136
27308213136
28308213136

[3,12,36,144,144,4356,4356,4356,7056,17424,176400,
 2547216,2547216,6290064,6780816,6780816,6780816,
 6780816,93315600,93315600,271986064,271986064,
 271986064,271986064,271986064,308213136,308213136,
 308213136]