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A140093 as a simple table

na(n)
31
40
53
60
712
80
954
100
11264
120
131365
140
157344
160
1740698
180
19230736
200
211332045
220
237803900
240
2546280520
260
27277294752
280
291676056044
300
3110207492512
320
3362576750610
340
35385856498592
360
372391506423565
380
3914890534347780
400

[1,0,3,0,12,0,54,0,264,0,1365,0,7344,0,40698,0,
 230736,0,1332045,0,7803900,0,46280520,0,277294752,
 0,1676056044,0,10207492512,0,62576750610,0,
 385856498592,0,2391506423565,0,14890534347780,0]