id:A159987 - OEIS Search Results

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Catalan numbers read modulo 8 .

+0
1

1, 1, 2, 5, 6, 2, 4, 5, 6, 6, 4, 2, 4, 4, 0, 5, 6, 6, 4, 6, 4, 4, 0, 2, 4, 4, 0, 4, 0, 0, 0, 5, 6, 6, 4, 6, 4, 4, 0, 6, 4, 4, 0, 4, 0, 0, 0, 2, 4, 4, 0, 4, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 5, 6, 6, 4, 6, 4, 4, 0, 6, 4, 4, 0, 4, 0, 0, 0, 6, 4, 4, 0, 4, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 0, 4, 0, 0, 0, 4, 0 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)= A000108(n) mod 8 .` `a(n) = A159981(n) (mod 4). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 30 2009]`
	MAPLE	`A000108 := proc(n) binomial(2*n, n)/(n+1) ; end: A159987 := proc(n) A000108(n) mod 8 ; end: seq(A159987(n), n=0..120) ; [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 30 2009]`
	CROSSREFS	`Sequence in context: A134387 A145058 A103130 this_sequence A143678 A021800 A140862` `Adjacent sequences: A159984 A159985 A159986 this_sequence A159988 A159989 A159990`
	KEYWORD	`easy,nonn`
	AUTHOR	`Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Apr 28 2009`
	EXTENSIONS	`Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 30 2009`

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

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