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A249856 as a simple table

na(n)
10
20
30
40
50
60
70
80
90
100
110
121
131
140
151
161
171
180
192
200
210
220
230
240
251
260
271
282
290
302
313
320
330
342
350
361
372
380
390
401
410
420
431
440
451
461
470
481
490
500
510
520
530
540
550
560
571
581
590
602
614
620
632
643
650
660
674
680
690
702
710
720
732
740
750
761
770
780
791
800
810
820
830
840
850
860

[0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,1,1,0,2,0,0,0,0,0,
 1,0,1,2,0,2,3,0,0,2,0,1,2,0,0,1,0,0,1,0,1,1,0,1,0,
 0,0,0,0,0,0,0,1,1,0,2,4,0,2,3,0,0,4,0,0,2,0,0,2,0,
 0,1,0,0,1,0,0,0,0,0,0,0]