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”).

A219793 as a simple table

na(n)
11
21
33
43
55
63
77
85
97
105
1111
125
1313
147
1532
1632
1717
187
1919
2032
2113
2211
2323
2432
2525
2613
2719
2813
2929
3032
3131
3217
3325
3417
35224
3613
3737
3819
39224
4017
4141
4213
4343
4425
45224
4623
4747
4817
4943
5025
51128
52224
5353
5419
5541
56224
5737
5829
5959
6017
6161
6231
6337
64128
65119
6625

[1,1,3,3,5,3,7,5,7,5,11,5,13,7,32,32,17,7,19,32,
 13,11,23,32,25,13,19,13,29,32,31,17,25,17,224,13,
 37,19,224,17,41,13,43,25,224,23,47,17,43,25,128,
 224,53,19,41,224,37,29,59,17,61,31,37,128,119,25]