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”).

A080683 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1919
2020
2121
2222
2323
2424
2525
2626
2727
2828
2930
3032
3133
3234
3335
3436
3538
3639
3740
3842
3944
4045
4146
4248
4349
4450
4551
4652
4754
4855
4956
5057
5160
5263
5364
5465
5566
5668
5769
5870
5972
6075
6176
6277
6378
6480
6581
6684
6785
6888
6990
7091
7192
7295

[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,
 20,21,22,23,24,25,26,27,28,30,32,33,34,35,36,38,
 39,40,42,44,45,46,48,49,50,51,52,54,55,56,57,60,
 63,64,65,66,68,69,70,72,75,76,77,78,80,81,84,85,
 88,90,91,92,95]