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”).

A120323 as a simple table

na(n)
00
13
21
30
41
53
60
73
81
90
101
113
120
133
141
150
161
173
180
193
201
210
221
233
240
253
261
270
281
293
300
313
321
330
341
353
360
373
381
390
401
413
420
433
441
450
461
473
480
493
501
510
521
533
540
553
561
570
581
593
600
613
621
630
641
653
660
673
681
690
701
713
720
733
741
750
761
773
780

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