id:A046224 - OEIS Search Results

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Distinct numbers seen when writing first numerator and then denominator of central elements of 1/2-Pascal triangle.

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1

1, 2, 3, 11, 40, 147, 546, 2046, 7722, 29315, 111826, 428298, 1646008, 6344366, 24515700, 94942620, 368404110, 1431985635, 5574725970, 21732560850, 84828633120, 331488081210, 1296712152060, 5077282282020, 19897457591700 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`1/1; 1/1 1/1; 1/1 1/2 1/1; 1/1 3/2 3/2 1/1; 1/1 5/2 3/1 5/2 1/1; 1/1 7/2 11/2 11/2 7/2 1/1; 1/1 9/2 9/1 11/1 9/1 9/2 1/1; 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ...`
	CROSSREFS	`Cf. A046213.` `Sequence in context: A088747 A007756 A000280 this_sequence A081173 A055692 A051075` `Adjacent sequences: A046221 A046222 A046223 this_sequence A046225 A046226 A046227`
	KEYWORD	`nonn`
	AUTHOR	`Mohammad K. Azarian (ma3(AT)evansville.edu)`
	EXTENSIONS	`More terms from James A. Sellers (sellersj(AT)math.psu.edu), Dec 13 1999`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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