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”).

A379144 as a simple table

na(n)
12
21
31
42
51
61
72
81
91
101
111
121
131
141
151
162
171
181
191
202
212
221
231
241
251
262
271
281
291
301
312
321
331
341
351
361
372
381
391
402
411
421
431
441
454
461
471
481
491
501
511
521
532
543
551
562
571
581
593
601
611
621
631
641
651
661
672
681
692
701
713
721
732
741
752
761
771
781
791
801
811
821
831
841
851
862
871
881
891
901
911
922
931
942
952
961
971
981
991

[2,1,1,2,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,2,2,1,1,1,
 1,2,1,1,1,1,2,1,1,1,1,1,2,1,1,2,1,1,1,1,4,1,1,1,1,
 1,1,1,2,3,1,2,1,1,3,1,1,1,1,1,1,1,2,1,2,1,3,1,2,1,
 2,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,2,1,2,2,1,1,1,1]