A076730 - OEIS

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A076730

Maximum number of primes that an n-digit number may shelter (i.e. primes contained amongst all digital substrings' permutations).

1, 4, 11, 31, 106 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,2`
	LINKS	`Table of n, a(n) for n=1..5.` `M. Keith, Integers containing many embedded primes` `W. Schneider, MATHEWS, Primeval Numbers`
	EXAMPLE	`We have a(3)=11, since amongst numbers 100 through 999, the smallest ones having 5, 6, 7, 8, 10, 11 embedded primes are respectively 107, 127, 113, 167, 179, 137, (the latter being the first reaching the maximum number of 11 embedded primes, viz. 3, 7, 13, 17, 31, 37, 71, 73, 137, 173, 317).`
	CROSSREFS	`Cf. A072857, A076449.` `Sequence in context: A027115 A077995 A176573 * A084757 A155962 A027153` `Adjacent sequences: A076727 A076728 A076729 * A076731 A076732 A076733`
	KEYWORD	`hard,more,base,nonn`
	AUTHOR	`Lekraj Beedassy, Nov 08 2002`
	EXTENSIONS	`Link fixed by Charles R Greathouse IV Aug 13 2009`
	STATUS	`approved`

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Last modified May 25 16:30 EDT 2013. Contains 225647 sequences.