id:A089780 - OEIS Search Results

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Concatenation of n numbers beginning with a(n) is a prime.

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2, 0, 3, 0, 7, 0, 1, 1, 1, 1, 3 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Subsidiary sequence: Index of the first occurrence of a 'n' digit number.`
	EXAMPLE	`2,03,307,0701,70111 etc. are primes.`
	CROSSREFS	`Sequence in context: A081155 A130628 A076563 this_sequence A163974 A067165 A079981` `Adjacent sequences: A089777 A089778 A089779 this_sequence A089781 A089782 A089783`
	KEYWORD	`base,more,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 24 2003`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.