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”).

A373247 as a simple table

na(n)
10
20
31
41
51
62
71
83
90
102
111
120
131
142
153
162
171
180
191
202
211
222
231
244
251
262
272
284
291
306
311
3210
331
342
353
360
371
382
393
400
411
422
431
442
453
462
471
486
491
502
513
524
531
544
553
566
571
582
591
600
611
622
633
6412
651
662
671
682
691
706
711
7212
731
742
753
764
771
786
791
8010
814
822
831
840
851
862
873
888
891
906
913
922
931
942
953
968
971
982
993
1001
1011
1026
1031
1044
1051

[0,0,1,1,1,2,1,3,0,2,1,0,1,2,3,2,1,0,1,2,1,2,1,4,
 1,2,2,4,1,6,1,10,1,2,3,0,1,2,3,0,1,2,1,2,3,2,1,6,
 1,2,3,4,1,4,3,6,1,2,1,0,1,2,3,12,1,2,1,2,1,6,1,12,
 1,2,3,4,1,6,1,10,4,2,1,0,1,2,3,8,1,6,3,2,1,2,3,8,
 1,2,3,1,1,6,1,4,1]