id:A144778 - OEIS Search Results

Search: id:A144778

Displaying 1-1 of 1 results found.

page 1

Square array T(n,k) read by antidiagonals upwards. Mobius function interleaved with k-1 zeros in each column. Every second value in the first row is either 1 or -1. Redheffer type matrix.

+0
1

1, -1, -1, -1, 1, 1, 0, 0, 0, -1, -1, -1, 1, 0, 1, 1, 0, 0, 0, 0, -1, -1, -1, 0, 1, 0, 0, 1, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1, -1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, -1 (list; table; graph; listen)

	OFFSET	`1,1`
	COMMENT	`The determinant of this matrix appears to be A059841.`
	FORMULA	`T(n,k) = if(n==1 then if(k mod 2==0 then -1 else 1) else if(n mod k == 0 then A008683(n/k) else 0)).`
	EXAMPLE	`Table begins:` `.1.-1..1.-1..1.-1..1` `-1..1..0..0..0..0..0` `-1..0..1..0..0..0..0` `.0.-1..0..1..0..0..0` `-1..0..0..0..1..0..0` `.1.-1.-1..0..0..1..0` `-1..0..0..0..0..0..1`
	CROSSREFS	`Cf. A008683, A059841, A143142.` `Sequence in context: A127507 A127247 A127244 this_sequence A143142 A111940 A129572` `Adjacent sequences: A144775 A144776 A144777 this_sequence A144779 A144780 A144781`
	KEYWORD	`sign,tabl`
	AUTHOR	`Mats O. Granvik (mgranvik(AT)abo.fi), Sep 21 2008`

page 1

Search completed in 0.002 seconds

Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

AT&T Labs Research