id:A050269 - OEIS Search Results

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Smallest value a for Diophantine 1-doubles (a,b) ordered by smallest b.

+0
2

1, 2, 3, 4, 5, 1, 3, 6, 7, 8, 9, 2, 4, 10, 11, 12, 1, 8, 13, 3, 5, 14, 15, 16, 17, 4, 6, 18, 3, 8, 19, 20, 21, 1, 2, 5, 7, 12, 15, 22, 23, 24, 25, 6, 8, 26, 27, 4, 12, 28, 29, 7, 9, 30, 3, 16, 31, 32, 1, 24, 33, 8, 10, 34, 35, 36, 5, 16, 37, 2, 3, 9, 11, 21, 24, 38, 39, 4, 20, 40, 41 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.` `P. Gibbs, Diophantine quadruples and Cayley's hyperdeterminant.`
	PROGRAM	`(PARI) an=vector(81); m=0; for(b=2, 43, for(a=1, b, if(issquare(a*b+1), an[ m++ ]=a))); an`
	CROSSREFS	`Cf. A050270.` `Sequence in context: A106652 A053827 A033926 this_sequence A097151 A071500 A071516` `Adjacent sequences: A050266 A050267 A050268 this_sequence A050270 A050271 A050272`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com)`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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