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 A129392 Triangle read by rows: T(r,c)=T(r,c-1)+T(r,c+1)+T(r-1,c-1). 5

%I #9 May 20 2014 14:52:32

%S 1,1,3,1,1,-5,-7,-5,1,1,7,5,3,5,7,1,1,3,1,-9,-15,-9,1,3,1,1,-33,-35,

%T -5,29,43,29,-5,-35,-33,1,1,91,89,31,-23,-49,-55,-49,-23,31,89,91,1,1,

%U -137,-139,-93,-43,19,85,115,85,19,-43,-93,-139,-137,1,1,51,49,135,225,183,1,-201,-287,-201,1,183,225,135,49,51,1,1,399

%N Triangle read by rows: T(r,c)=T(r,c-1)+T(r,c+1)+T(r-1,c-1).

%C All edge elements are 1 and the triangle is symmetric about the central line. For all elements x inside the triangle

%C ..a..

%C .bxc.

%C we have x=a+b+c. The triangle is symmetric. The top of the triangle thus is

%C ........1

%C .....1..3..1

%C ..1.-5.-7.-5..1

%C 1..7..5..3..5..7..1

%H R. J. Mathar, <a href="/A129392/a129392.pdf">Comments on A129392, A129394 and A129396</a>

%Y Cf. A129393, A129394, A129396, A129398.

%K sign,tabf

%O 0,3

%A _Jonas Wallgren_, Apr 13 2007

%E More terms from _R. J. Mathar_, Jan 17 2008

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Last modified September 12 07:57 EDT 2024. Contains 375850 sequences. (Running on oeis4.)