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”).

A033000 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1218
1319
1420
1521
1622
1723
1831
1932
2033
2134
2235
2344
2445
2546
2647
2757
2858
2959
3060
3170
3271
3372
3473
3583
3684
3785
3886
3996
4097
4198
4299
43108
44109
45110
46111
47112
48120
49121
50122
51123
52124
53125
54132
55133
56134
57135
58136

[1,2,3,4,5,6,7,8,9,10,11,18,19,20,21,22,23,31,32,
 33,34,35,44,45,46,47,57,58,59,60,70,71,72,73,83,
 84,85,86,96,97,98,99,108,109,110,111,112,120,121,
 122,123,124,125,132,133,134,135,136]