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A049218 as a simple table

na(n)
11
20
31
4-2
50
61
70
8-8
90
101
1124
120
13-20
140
151
160
17184
180
19-40
200
211
22-720
230
24784
250
26-70
270
281
290
30-8448
310
322464
330
34-112
350
361
3740320
380
39-52352
400
416384
420
43-168
440
451
460
47648576
480
49-229760
500
5114448
520
53-240
540
551
56-3628800
570
585360256
590
60-804320
610
6229568
630
64-330
650
661

[1,0,1,-2,0,1,0,-8,0,1,24,0,-20,0,1,0,184,0,-40,0,
 1,-720,0,784,0,-70,0,1,0,-8448,0,2464,0,-112,0,1,
 40320,0,-52352,0,6384,0,-168,0,1,0,648576,0,
 -229760,0,14448,0,-240,0,1,-3628800,0,5360256,0,
 -804320,0,29568,0,-330,0,1]