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”).

A033892 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1314
1415
1516
1618
1720
1821
1922
2023
2124
2227
2330
2432
2536
2640
2742
2848
2954
3055
3156
3260
3363
3464
3572
3680
3796
38108
39110
40112
41120
42126
43128
44144
45160
46168
47180
48192
49216
50240
51253
52256
53288

[1,2,3,4,5,6,7,8,9,10,11,12,14,15,16,18,20,21,22,
 23,24,27,30,32,36,40,42,48,54,55,56,60,63,64,72,
 80,96,108,110,112,120,126,128,144,160,168,180,192,
 216,240,253,256,288]