id:A071819 - OEIS Search Results

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a(n) is the difference between the two smallest positive integers that you cannot obtain using the integers {1,2,...,n} at most once and the four operators +, -, *, /.

+0
1

1, 1, 1, 2, 3, 23, 5, 144, 98, 658 (list; graph; listen)

	OFFSET	`1,4`
	LINKS	`G. Bannay, LE COMPTE EST BON` `Index entries for similar sequences`
	EXAMPLE	`a(4)=2 because 29 and 31 are the smallest numbers that you cannot obtain using {1,2,3,4} and the four operations and 31-29 = 2.`
	CROSSREFS	`Cf. A060315.` `Sequence in context: A130846 A114101 A114007 this_sequence A085946 A042585 A143279` `Adjacent sequences: A071816 A071817 A071818 this_sequence A071820 A071821 A071822`
	KEYWORD	`hard,more,nonn`
	AUTHOR	`Koksal Karakus (karakusk(AT)hotmail.com), Jun 07 2002`

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Last modified December 19 21:04 EST 2009. Contains 171054 sequences.

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