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”).

A263257 as a simple table

na(n)
00
11
23
35
47
519
623
727
829
931
1035
1137
1241
1343
1451
1553
1657
1759
1861
1965
2067
2171
2273
2377
2479
25223
26231
27233
28237
29239
30241
31249
32251
33263
34267
35269
36271
37277
38285
39291
40293
41299
42303
43315
44317
45321
46327
47331
48335
49337
50341
51347
52349
53357
54359
55369
56857
57859
581077
591081
601087
611095
621097
631101

[0,1,3,5,7,19,23,27,29,31,35,37,41,43,51,53,57,59,
 61,65,67,71,73,77,79,223,231,233,237,239,241,249,
 251,263,267,269,271,277,285,291,293,299,303,315,
 317,321,327,331,335,337,341,347,349,357,359,369,
 857,859,1077,1081,1087,1095,1097,1101]