id:A078994 - OEIS Search Results

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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.

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1, 1, 1, -2, -24, -138, -500, 1200, 56256, 904912, 11937696, 144543360, 1639736320, 16965191808, 141946949376, 376837224448, -23412830208000, -860170849536000, -22132932250013696, -501053473607319552, -10543220910009286656, -208356118642682839040 (list; graph; listen)

	OFFSET	`0,4`
	PROGRAM	`(PARI) a(n)=matdet(matrix(n, n, i, j, if(i-j, abs(i-j), i)))`
	CROSSREFS	`Sequence in context: A060817 A045820 A098455 this_sequence A000185 A163752 A035600` `Adjacent sequences: A078991 A078992 A078993 this_sequence A078995 A078996 A078997`
	KEYWORD	`sign`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 17 2003`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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