Search: id:A155046
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%I A155046
%S A155046 1,1,3,2,7,5,17,12,41,29,99,70,239,169,577,408,1393,985,3363,2378,8119,
%T A155046 5741,19601,13860,47321,33461,114243,80782,275807,195025,665857,470832,
%U A155046 1607521,1136689,3880899,2744210,9369319,6625109,22619537,15994428
%N A155046 List of pairs: first pair is (1,1); then follow (x,y) by (x+2y, x+y).
%F A155046 a(n)=2*a(n-2)+a(n-4). Sequence of x: A078057(n). Sequence of y: A000129(n). 
               [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 19 2009]
%e A155046 (1,1), (3,2), (7,5), (17,12)
%Y A155046 Cf. A002965 [From Jaume Oliver Lafont (joliverlafont(AT)gmail.com), Feb 
               08 2009]
%Y A155046 Sequence in context: A130922 A006921 A014693 this_sequence A033318 A093780 
               A161749
%Y A155046 Adjacent sequences: A155043 A155044 A155045 this_sequence A155047 A155048 
               A155049
%K A155046 nonn,tabf
%O A155046 1,3
%A A155046 Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 19 2009
%E A155046 Corrected first term in two pairs. R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Feb 19 2009

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