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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. 0

%I #5 Mar 30 2012 18:39:11

%S 1,1,1,-2,-24,-138,-500,1200,56256,904912,11937696,144543360,

%T 1639736320,16965191808,141946949376,376837224448,-23412830208000,

%U -860170849536000,-22132932250013696,-501053473607319552,-10543220910009286656,-208356118642682839040

%N 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 (PARI) a(n)=matdet(matrix(n,n,i,j,if(i-j,abs(i-j),i)))

%K sign

%O 0,4

%A _Benoit Cloitre_, Jan 17 2003

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Last modified April 22 20:16 EDT 2024. Contains 371906 sequences. (Running on oeis4.)