%I A078994
%S A078994 1,1,1,2,24,138,500,1200,56256,904912,11937696,144543360,1639736320,16965191808,
%T A078994 141946949376,376837224448,23412830208000,860170849536000,22132932250013696,
%U A078994 501053473607319552,10543220910009286656,208356118642682839040
%V A078994 1,1,1,-2,-24,-138,-500,1200,56256,904912,11937696,144543360,1639736320,
               16965191808,
%W A078994 141946949376,376837224448,-23412830208000,-860170849536000,-22132932250013696,
%X A078994 -501053473607319552,-10543220910009286656,-208356118642682839040
%N A078994 Determinant of n X n matrix M(n) where m(i,i)=i if i>j, m(i,j)=i-j if 
               j>i, m(i,j)=j-i.
%o A078994 (PARI) a(n)=matdet(matrix(n,n,i,j,if(i-j,abs(i-j),i)))
%Y A078994 Sequence in context: A060817 A045820 A098455 this_sequence A000185 A163752 
               A035600
%Y A078994 Adjacent sequences: A078991 A078992 A078993 this_sequence A078995 A078996 
               A078997
%K A078994 sign
%O A078994 0,4
%A A078994 Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 17 2003