A152490 - OEIS

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A152490

Determinants of first 4x4 part of A051731 whose columns has been shifted with sequence A152489.

1, 0, -1, 0, 0, 1, 0, -1, -1, -1, 1, 1, -1, 0, 1, 0, 0, -1, 0, 1, 1, 1, -1, -1 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`The idea is to shift the columns in A051731 one column one step at a time like the changing symbols in a slot machine. For example a(1)=1 is the unshifted version of A051731 and for a(4)=0, the last column has been shifted 3 steps upwards, which is the fourth value of the mobius function. Sequence contains equally many values of 1,-1 and 0.`
	EXAMPLE	`The 3x3 array is shorter to write down:` `By using indices similar to array A152489;` `0,0,0; 0,0,1; 0,0,2; 0,1,0; 0,1,1; 0,1,2;` `the columns in A051731 are shifted like in a slot machine;` `1,0,0; 1,0,0; 1,0,1; 1,1,0; 1,1,0; 1,1,1;` `1,1,0; 1,1,1; 1,1,0; 1,0,0; 1,0,1; 1,0,0;` `1,0,1; 1,0,0; 1,0,0; 1,1,1; 1,1,0; 1,1,0;` `and the determinants are then:` `1; 0; -1; -1; 0; 1;`
	CROSSREFS	`Sequence in context: A104104 A078588 A039983 * A145273 A120522 A157423` `Adjacent sequences: A152487 A152488 A152489 * A152491 A152492 A152493`
	KEYWORD	`fini,full,sign`
	AUTHOR	`Mats Granvik (mats.granvik(AT)abo.fi), Dec 06 2008`

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.