id:A100208 - OEIS Search Results

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Minimal permutation of the natural numbers such that the sum of squares of two consecutive terms is a prime.

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1, 2, 3, 8, 5, 4, 9, 10, 7, 12, 13, 20, 11, 6, 19, 14, 15, 22, 17, 18, 23, 30, 29, 16, 25, 24, 35, 26, 21, 34, 39, 40, 33, 28, 37, 32, 27, 50, 31, 44, 41, 46, 49, 36, 65, 38, 45, 52, 57, 68, 43, 42, 55, 58, 47, 48, 53, 62, 73, 60, 61, 54, 59, 64, 71, 66, 79, 56, 51, 76, 85, 72 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(1) = 1 and for n>1: a(n) = smallest m not occurring earlier such that m^2 + a(n-1)^2 is a prime;` `a(A100211(n) = A100211(a(n) = n;` `A100209(n) = a(n)^2 + a(n+1)^2; A073658(n) = a(n)^2.`
	LINKS	`Index entries for sequences that are permutations of the natural numbers`
	CROSSREFS	`Sequence in context: A161198 A093898 A084110 this_sequence A093928 A135874 A138682` `Adjacent sequences: A100205 A100206 A100207 this_sequence A100209 A100210 A100211`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 08 2004`

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Last modified March 20 09:10 EDT 2010. Contains 173642 sequences.

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