%I A088014
%S A088014 2,1,5,7,21,41,107,239,593,1393,3395,8119,19665,47321,114371,275807,
%T A088014 666113,1607521,3881411,9369319,22620561,54608393,131838371,318281039,
%U A088014 768402497,1855077841,4478562275,10812186007,26102942481,63018038201
%N A088014 E.g.f.: cosh(sqrt(2)x)(1+exp(x)).
%F A088014 G.f.: (2-3x-3x^2+2x^2)/(1-2x-3x^2+4x^3+2x^4); E.g.f. : cosh(sqrt(2)x)(1+exp(x)); 
               a(n)=((sqrt(2))^n+(-sqrt(2))^n+(1+sqrt(2))^n+(1-sqrt(2))^n)/2.
%Y A088014 Cf. A052950.
%Y A088014 Cf. A002315.
%Y A088014 Sequence in context: A093545 A005297 A014551 this_sequence A141507 A059274 
               A082635
%Y A088014 Adjacent sequences: A088011 A088012 A088013 this_sequence A088015 A088016 
               A088017
%K A088014 easy,nonn
%O A088014 0,1
%A A088014 Paul Barry (pbarry(AT)wit.ie), Sep 18 2003