Search: id:A111519
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%I A111519
%S A111519 1,1,2,6,1,12,50,64,517,718,4893,27627,20732,464357,2672305,2162339,62481580,
%T A111519 444310916,765988257,11093444366,111888950896,384937404033,2094287782189,
%U A111519 37323429564497,222553834299716,59765515327025,14271643579848985,141966128047629231
%V A111519 1,1,-2,-6,1,12,-50,-64,517,-718,-4893,27627,-20732,-464357,2672305,-2162339,
               -62481580,
%W A111519 444310916,-765988257,-11093444366,111888950896,-384937404033,-2094287782189,
%X A111519 37323429564497,-222553834299716,-59765515327025,14271643579848985,-141966128047629231
%N A111519 Sequence is {a(1,n)}, where a(m,n) is defined at sequence A111518.
%H A111519 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%e A111519 a(0,n): 1,0,-3,-4,7,...
%e A111519 a(1,n): 1,1,-2,-6,1,...
%e A111519 a(2,n): 1,2,0,-6,-5,...
%e A111519 a(3,n): 1,3,3,-3,-8,...
%e A111519 a(4,n): 1,4,7,4,-4,...
%e A111519 Main diagonal is 1,1,0,-3,-4,..., which is 1 followed by sequence a(0,
               n).
%p A111519 A111519T := proc(nmax) local a,m,n; a := array(0..nmax,0..nmax) ; for 
               m from 0 to nmax do a[m,0] := 1 ; od ; for n from 1 to nmax do a[n,
               n] := a[0,n-1] ; for m from n+1 to nmax do a[m,n] := a[m-1,n]+a[m,
               n-1] ; od ; for m from n-1 to 0 by -1 do a[m,n] := a[m+1,n]-a[m+1,
               n-1] ; od ; od ; RETURN(a) ; end: nmax := 50 ; a := A111519T(nmax) 
               ; r := 1 ; for n from 0 to nmax do printf("%d,",a[r,n]) ; od; - R. 
               J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 26 2006
%Y A111519 Cf. A111518, A111520, A111521, A111522, A111523.
%Y A111519 Sequence in context: A100831 A136763 A109530 this_sequence A008855 A132181 
               A027642
%Y A111519 Adjacent sequences: A111516 A111517 A111518 this_sequence A111520 A111521 
               A111522
%K A111519 easy,sign
%O A111519 0,3
%A A111519 Leroy Quet Aug 05 2005
%E A111519 More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 26 2006

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