id:A138244 - OEIS Search Results

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a(1)=1; for n>1, a(n) = smallest integer > a(n-1) such that a(n) is coprime to (a(k)-a(k-1)) for all k, 2<=k<=n and such that (a(n)-a(n-1)) doesn't equal (a(k)-a(k-1)) for any k, 2<=k<=n-1.

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1, 2, 5, 7, 11, 17, 25, 37, 47, 61, 79, 101, 127, 151, 167, 197, 229, 257, 277, 311, 347, 389, 433, 479, 541, 593, 631, 691, 739, 797, 853, 907, 947, 997, 1061, 1129, 1201, 1277, 1361, 1427, 1517, 1597, 1667, 1741, 1823, 1901, 1987, 2081, 2179, 2267, 2371 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n+1)-a(n) = A138245(n)`
	LINKS	`Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Mar 09 2008, Table of n, a(n) for n = 1..1000` `Leroy Quet, Home Page (listed in lieu of email address)`
	CROSSREFS	`Cf. A138245.` `Sequence in context: A062044 A077128 A106008 this_sequence A019396 A153767 A038973` `Adjacent sequences: A138241 A138242 A138243 this_sequence A138245 A138246 A138247`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet Mar 08 2008`
	EXTENSIONS	`More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Mar 09 2008`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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