id:A074349 - OEIS Search Results

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a(1)=1, a(n) is smallest number > a(n-1) such that all pair juxtapositions a(1)a(n),...,a(n-1)a(n) are primes.

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1, 3, 7, 97, 187, 1699, 190699 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`What is the next term? Is this sequence infinite?`
	EXAMPLE	`all 21 pair mergers: {13, 17, 197, 1187, 11699, 1190699}, {37, 397, 3187, 31699, 3190699}, {797, 7187, 71699, 7190699}, {97187, 971699, 97190699}, {1871699, 187190699} and 1699190699 are primes.`
	CROSSREFS	`Sequence in context: A042481 A088419 A062592 this_sequence A159310 A129660 A158467` `Adjacent sequences: A074346 A074347 A074348 this_sequence A074350 A074351 A074352`
	KEYWORD	`nonn,base`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Sep 23 2002`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.