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”).

A253084 as a simple table

na(n)
01
11
21
31
40
51
61
70
81
91
101
110
120
130
141
151
161
170
180
191
201
211
220
230
240
251
260
271
281
290
300
310
321
330
341
351
361
370
380
390
400
410
420
430
441
451
461
470
480
490
500
510
520
531
541
551
560
571
580
590
600
610
620
631
640
651
661
670
681
691
700
710
720
730
741
750
761
771
781
790
800
810
820
830
840
850
861
870
880
890
901
911
921
930
940
950
960
970
980
991
1001
1010
1020
1031
1041
1051
1060
1070
1080
1090
1100
1110
1120
1131
1140
1150
1160
1171
1180
1191
1201

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