%I A014634
%S A014634 1,15,45,91,153,231,325,435,561,703,861,1035,1225,1431,
%T A014634 1653,1891,2145,2415,2701,3003,3321,3655,4005,4371,4753,
%U A014634 5151,5565,5995,6441,6903,7381,7875,8385,8911,9453,10011
%N A014634 (2n+1)(4n+1).
%C A014634 Odd hexagonal numbers. Bisection of A000384. - Omar E. Pol (info(AT)polprimos.com), 
               Apr 06 2008
%C A014634 A014634 * 2 = A157870. A157870 / 2 = A014634. [From Vladimir Orlovsky 
               (4vladimir(AT)gmail.com), Mar 10 2009]
%F A014634 a(n)=16*n+a(n-1)-18 (with a(1)=1) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), 
               Nov 16 2009]
%e A014634 For n=2, a(2)=16*2+1-18=15; n=3, a(3)=16*3+15-18=45; n=4, a(4)=16*4+45-18=91 
               [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Nov 16 2009]
%t A014634 lst={};Do[a=(2*n+1)*(4*n+1);AppendTo[lst,a],{n,0,5!}];lst [From Vladimir 
               Orlovsky (4vladimir(AT)gmail.com), Mar 10 2009]
%Y A014634 Cf. A000384.
%Y A014634 Sequence in context: A033849 A164788 A060536 this_sequence A126228 A072251 
               A002756
%Y A014634 Adjacent sequences: A014631 A014632 A014633 this_sequence A014635 A014636 
               A014637
%K A014634 nonn,easy,new
%O A014634 0,2
%A A014634 Mohammad K. Azarian (ma3(AT)evansville.edu), N. J. A. Sloane (njas(AT)research.att.com).