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A011991 as a simple table

na(n)
71
80
90
100
110
120
131
140
152
160
170
180
194
200
217
220
230
240
2512
260
278
280
290
300
3180
320
3384
340
350
360
37820
380
39798
400
410
420
439508
440
4511616
460
470
480
49157340
500
51139828
520
530
540
553027456
560
572353310

[1,0,0,0,0,0,1,0,2,0,0,0,4,0,7,0,0,0,12,0,8,0,0,0,
 80,0,84,0,0,0,820,0,798,0,0,0,9508,0,11616,0,0,0,
 157340,0,139828,0,0,0,3027456,0,2353310]