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”).

A077223 as a simple table

na(n)
11
22
33
44
57
66
75
88
99
1010
1111
1212
1317
1414
1515
1616
1713
1818
1919
2020
2121
2222
2325
2426
2527
2624
2723
2828
2929
3030
3131
3234
3333
3432
3535
3636
3737
3840
3939
4038
4141
4242
4343
4444
4545
4646
4747
4848
4949
5052
5151
5250
5353
5454
5555
5656
5757
5858
5961
6062
6165
6264
6359
6460
6563
6666
6767
6870
6969
7068
7171
7272

[1,2,3,4,7,6,5,8,9,10,11,12,17,14,15,16,13,18,19,
 20,21,22,25,26,27,24,23,28,29,30,31,34,33,32,35,
 36,37,40,39,38,41,42,43,44,45,46,47,48,49,52,51,
 50,53,54,55,56,57,58,61,62,65,64,59,60,63,66,67,
 70,69,68,71,72]