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A090517 Least k such that floor[(10^n)/k] is prime. 3
2, 9, 12, 13, 28, 19, 7, 27, 12, 13, 17, 74, 17, 14, 82, 66, 36, 44, 9, 36, 21, 13, 9, 90, 7, 19, 149, 51, 321, 35, 12, 14, 140, 13, 28, 42, 34, 36, 153, 155, 133, 46, 73, 106, 162, 109, 122, 42, 62, 422, 29, 231, 38, 34, 340, 295, 151, 197, 94, 19, 17, 83, 131, 66, 36 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..65.

EXAMPLE

a(1) = 2 as 10/2 = 5 is a prime. a(3) = 12 as floor[1000/12] = 83 is prime.

CROSSREFS

Cf. A090518, A090519, A090520.

Sequence in context: A083159 A041335 A042147 * A092191 A030376 A080520

Adjacent sequences:  A090514 A090515 A090516 * A090518 A090519 A090520

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 07 2003

EXTENSIONS

Corrected and extended by Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Jan 28 2004

Further terms from David Wasserman, Dec 20 2005

STATUS

approved

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Last modified May 23 12:14 EDT 2013. Contains 225587 sequences.