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”).

A323431 as a simple table

na(n)
01
11
21
33
43
55
67
79
811
915
1021
1125
1233
1341
1453
1565
1681
1797
18121
19143
20173
21215
22255
23305
24367
25441
26527
27637
28751
29899
301067
311269
321491
331775
342071
352439
362875
373357
383911
394577
405309
416177
427171
438305
449609
4511151

[1,1,1,3,3,5,7,9,11,15,21,25,33,41,53,65,81,97,
 121,143,173,215,255,305,367,441,527,637,751,899,
 1067,1269,1491,1775,2071,2439,2875,3357,3911,4577,
 5309,6177,7171,8305,9609,11151]