This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A112052 #2 Mar 31 2012 14:02:21 %S A112052 3,7,23,49,121,169,289,361,529,841,961,1369,1681,1849,2209,2809,3481, %T A112052 3721,4489,5041,5329,6241,6889,7921,9409,10201,10609,11449,11881, %U A112052 12769,16129,17161,18769,19321,22201,22801,24649,26569,27889,29929 %N A112052 a(n) = 2*A112051(n)+1. %C A112052 From n>=4 onward seems to be squares of primes (A001248). %F A112052 A005408(A112051(n)) %Y A112052 Column 1 of A112070 (row 1 of A112071). %K A112052 nonn %O A112052 1,1 %A A112052 _Antti Karttunen_, Aug 27 2005