id:A093378 - OEIS Search Results

Search: id:A093378

Displaying 1-1 of 1 results found.

page 1

a(n) = numerator of any non-diagonal entry of the matrix A^n, where A is described in the Comments lines.

+0
2

2, 12, 22, 168, 1558, 5148, 8062, 177072, 860882, 738492, 121008888, 298775878, 1232566932, 14864798542, 58374617952 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A =` `[ -(3/5)-(2/5)i,-(2/5)i,-(2/5)i,-(2/5)i ]` `[ -(2/5)i,-(3/5)+(2/5)i,-(2/5)i,(2/5)i ]` `[ -(2/5)i,-(2/5)i,-(3/5)+(2/5)i,(2/5)i ]` `[ -(2/5)i,(2/5)i,(2/5)i,-(3/5)-(2/5)i ]` `is the Cayley transform of the matrix iH, where H =` `[1,1,1,1]` `[1,-1,1,-1]` `[1,1,-1,-1]` `[1,-1,-1,1]` `is an Hadamard matrix of order 4 and i is the imaginary unit.`
	CROSSREFS	`Cf. A066771.` `Sequence in context: A111095 A073211 A094626 this_sequence A012664 A012545 A009514` `Adjacent sequences: A093375 A093376 A093377 this_sequence A093379 A093380 A093381`
	KEYWORD	`nonn,frac`
	AUTHOR	`Simone Severini (ss54(AT)york.ac.uk), Apr 28 2004`

page 1

Search completed in 0.002 seconds

Last modified December 3 22:15 EST 2009. Contains 170310 sequences.