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”).

A077266 as a simple table

na(n)
21
30
41
52
60
71
81
90
100
111
121
131
140
150
161
170
180
190
200
210
221
233
240
251
260
270
280
291
302
312
320
330
340
350
360
371
382
391
400
411
420
430
440
450
461
471
481
490
500
510
520
530
540
550
561
572
581
591
600
611
620
630
640
650
660
671
681
690
700
710
720
730
740
750
760
770
780
791
801
810
820
830
840
851
860
870
880
890
900
910
921
930
941
950
961
970
980
990
1000
1010
1020
1030
1040
1050
1061

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