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”).

A340673 as a simple table

na(n)
11
22
32
43
52
62
72
81
93
102
112
121
132
142
152
165
172
181
192
201
212
222
232
241
253
262
271
281
292
302
312
321
332
342
352
363
372
382
392
401
412
422
432
441
451
462
472
481
493
501
512
521
532
541
552
561
572
582
592
601
612
622
631
641
652
662
672
681
692
702
712
721
732
742
751
761
772
782
792
801
815
822
832
841
852
862
872
881
892
901
912
921
932
942
952
961
972
981
991
1003
1012
1022
1032
1041
1052

[1,2,2,3,2,2,2,1,3,2,2,1,2,2,2,5,2,1,2,1,2,2,2,1,
 3,2,1,1,2,2,2,1,2,2,2,3,2,2,2,1,2,2,2,1,1,2,2,1,3,
 1,2,1,2,1,2,1,2,2,2,1,2,2,1,1,2,2,2,1,2,2,2,1,2,2,
 1,1,2,2,2,1,5,2,2,1,2,2,2,1,2,1,2,1,2,2,2,1,2,1,1,
 3,2,2,2,1,2]