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”).

A251754 as a simple table

na(n)
13
25
33
43
52
66
73
88
99
103
115
123
133
142
156
163
178
189
193
205
213
223
232
246
253
268
279
283
295
303
313
322
336
343
358
369
373
385
393
403
412
426
433
448
459
463
475
483
493
502
516
523
538
549
553
565
573
583
592
606
613
628
639
643
655
663
673
682
696
703
718
729
733
745
753
763
772
786
793
808
819
823
835
843
853
862
876
883
898
909
913
925
933
943
952
966
973
988
999
1003

[3,5,3,3,2,6,3,8,9,3,5,3,3,2,6,3,8,9,3,5,3,3,2,6,
 3,8,9,3,5,3,3,2,6,3,8,9,3,5,3,3,2,6,3,8,9,3,5,3,3,
 2,6,3,8,9,3,5,3,3,2,6,3,8,9,3,5,3,3,2,6,3,8,9,3,5,
 3,3,2,6,3,8,9,3,5,3,3,2,6,3,8,9,3,5,3,3,2,6,3,8,9,
 3]