login
a(n) = 2*A112051(n)+1.
3

%I #2 Mar 31 2012 14:02:21

%S 3,7,23,49,121,169,289,361,529,841,961,1369,1681,1849,2209,2809,3481,

%T 3721,4489,5041,5329,6241,6889,7921,9409,10201,10609,11449,11881,

%U 12769,16129,17161,18769,19321,22201,22801,24649,26569,27889,29929

%N a(n) = 2*A112051(n)+1.

%C From n>=4 onward seems to be squares of primes (A001248).

%F A005408(A112051(n))

%Y Column 1 of A112070 (row 1 of A112071).

%K nonn

%O 1,1

%A _Antti Karttunen_, Aug 27 2005