id:A046223 - OEIS Search Results

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First denominator and then numerator of central elements of 1/2-Pascal triangle.

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

	OFFSET	`1,3`
	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: A089141 A003687 A104575 this_sequence A073463 A127948 A145975` `Adjacent sequences: A046220 A046221 A046222 this_sequence A046224 A046225 A046226`
	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 November 25 20:09 EST 2009. Contains 167514 sequences.

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