%I A129392
%S A129392 1,1,3,1,1,5,7,5,1,1,7,5,3,5,7,1,1,3,1,9,15,9,1,3,1,1,33,35,5,29,43,29,
               5,35,
%T A129392 33,1,1,91,89,31,23,49,55,49,23,31,89,91,1,1,137,139,93,43,19,85,115,85,
               19,
%U A129392 43,93,139,137,1,1,51,49,135,225,183,1,201,287,201,1,183,225,135,49,51,
               1,1,399
%V A129392 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,-5,
               29,43,29,-5,-35,
%W A129392 -33,1,1,91,89,31,-23,-49,-55,-49,-23,31,89,91,1,1,-137,-139,-93,-43,19,
               85,115,85,19,
%X A129392 -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 A129392 Triangle read by rows: T(r,c)=T(r,c-1)+T(r,c+1)+T(r-1,c-1).
%C A129392 All edge elements are 1 and the triangle is symmetric about the central 
               line. For all elements x inside the triangle
%C A129392 ..a..
%C A129392 .bxc.
%C A129392 we have x=a+b+c. The triangle is symmetric. The top of the triangle thus 
               is
%C A129392 ........1
%C A129392 .....1..3..1
%C A129392 ..1.-5.-7.-5..1
%C A129392 1..7..5..3..5..7..1
%H A129392 R. J. Mathar, <a href="a129392.pdf">Comments on A129392, A129394 and 
               A129396</a>
%H A129392 R. J. Mathar, <a href="http://www.strw.leidenuniv.nl/~mathar/progs/a129392.pdf">
               OEIS A129392</a> (PDF).
%Y A129392 Cf. A129393, A129394, A129396, A129398.
%Y A129392 Sequence in context: A099608 A047969 A047812 this_sequence A118538 A141523 
               A086385
%Y A129392 Adjacent sequences: A129389 A129390 A129391 this_sequence A129393 A129394 
               A129395
%K A129392 sign,tabf
%O A129392 0,3
%A A129392 Jonas Wallgren (jonwa(AT)ida.liu.se), Apr 13 2007
%E A129392 More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 17 2008