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”).

A204545 as a simple table

na(n)
11
20
30
40
50
60
71
81
91
101
111
121
131
141
151
160
170
180
190
200
210
220
230
240
250
260
270
280
291
301
311
321
331
341
351
361
371
381
391
401
411
421
431
441
451
460
470
480
490
500
510
520
530
540
550
560
570
580
590
600
610
620
630
640
650
660
671
681
691
701
711
721
731
741
751
761
771
781
791
801
811
821
831
841
851
861
871
881
891
901
911
920
930
940
950
960
970
980
990

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