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”).

A080887 as a simple table

na(n)
10
20
31
40
50
60
71
81
91
101
110
121
131
141
150
160
171
181
190
200
210
221
230
240
250
260
271
281
291
300
311
321
331
341
350
360
370
381
390
400
411
421
431
441
451
460
471
481
491
501
511
521
531
541
550
561
570
580
590
600
610
620
631
640
650
660
670
680
690
700
711
720
731
741
750
760
771
781
790
801
811
821
830
840
851
861
870
881
890
900
911
921
930
940
951
961
970
981
990

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