id:A112544 - OEIS Search Results

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Denominators of fractions n/m in array by anti-diagonals.

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1, 1, 2, 1, 1, 3, 1, 2, 3, 4, 1, 1, 1, 2, 5, 1, 2, 3, 4, 5, 6, 1, 1, 3, 1, 5, 3, 7, 1, 2, 1, 4, 5, 2, 7, 8, 1, 1, 3, 2, 1, 3, 7, 4, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 1, 1, 1, 5, 1, 7, 2, 3, 5, 11, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1, 1, 3, 2, 5, 3, 1, 4, 9, 5, 11, 6, 13, 1, 2, 1, 4, 1, 2, 7, 8, 3 (list; graph; listen)

	OFFSET	`1,3`
	PROGRAM	`(PARI) t1(n)=binomial(floor(3/2+sqrt(2n)), 2)-n+1 t2(n)=n-binomial(floor(1/2+sqrt(2n)), 2) vector(100, n, t2(n)/gcd(t1(n), t2(n)))`
	CROSSREFS	`Numerators in A112543. See comments and references there.` `Adjacent sequences: A112541 A112542 A112543 this_sequence A112545 A112546 A112547` `Sequence in context: A025840 A029284 A123275 this_sequence A134521 A131375 A112798`
	KEYWORD	`easy,frac,nonn`
	AUTHOR	`Frank Adams-Watters (FrankTAW(AT)Netscape.net), Sep 11 2005`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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