id:A111575 - OEIS Search Results

Search: id:A111575

Displaying 1-1 of 1 results found.

page 1

Powers of 3 repeated four times.

+0
5

1, 1, 1, 1, 3, 3, 3, 3, 9, 9, 9, 9, 27, 27, 27, 27, 81, 81, 81, 81, 243, 243, 243, 243, 729, 729, 729, 729, 2187, 2187, 2187, 2187, 6561, 6561, 6561, 6561, 19683, 19683, 19683, 19683, 59049, 59049, 59049, 59049, 177147, 177147, 177147, 177147, 531441 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Generating sequence for the number of 0's and 1's in the parity of A006072 and A111065.`
	FORMULA	`3^[n/4]` `O.g.f.: -(1+x)(1+x^2)/(-1+3x^4) . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 08 2008`
	EXAMPLE	`a(10)=3^[10/4]=3^2=9`
	CROSSREFS	`Cf. A006072, A111065, A108411.` `Sequence in context: A078229 A007428 A074816 this_sequence A087576 A087575 A001270` `Adjacent sequences: A111572 A111573 A111574 this_sequence A111576 A111577 A111578`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jeremy Gardiner (jeremy.gardiner(AT)btinternet.com), Nov 17 2005`

page 1

Search completed in 0.002 seconds

Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

AT&T Labs Research