login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A102560 as a simple table

na(n)
01
10
20
3-1
41
50
60
7-1
81
90
100
11-1
121
130
140
15-1
161
170
180
19-1
201
210
220
23-1
241
250
260
27-1
281
290
300
31-1
321
330
340
35-1
361
370
380
39-1
401
410
420
43-1
441
450
460
47-1
481
490
500
51-1
521
530
540
55-1
561
570
580
59-1
601
610
620
63-1
641
650
660
67-1
681
690
700
71-1
721
730
740
75-1
761
770
780
79-1
801
810
820
83-1
841
850
860
87-1
881
890
900
91-1
921
930
940
95-1
961
970
980
99-1
1001
1010
1020
103-1
1041
1050
1060
107-1
1081

[1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,
 0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,
 1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,
 0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,
 1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1,0,0,-1,1]