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A105185 Least multiple of n such that every partial concatenation followed by a 9 is prime. 0
1, 4, 3, 8, 10, 30, 84, 56, 18, 100, 198, 108, 351, 42, 375, 128, 136, 450, 551, 600, 966, 66, 552, 336, 2125, 780, 594, 2576, 348, 2520, 4867, 288, 726, 1802, 5740, 2664, 6438, 722, 4446, 1080, 4674, 3150, 559, 1628, 8955, 3358, 15933, 576, 1764, 1700, 5763, 2652 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..52.

EXAMPLE

19,149,1439,14389,1438109,... etc. are all prime.

CROSSREFS

Cf. A110436, A110437, A109744.

Sequence in context: A175047 A316688 A309517 * A165739 A196132 A198179

Adjacent sequences:  A105182 A105183 A105184 * A105186 A105187 A105188

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Aug 03 2005

EXTENSIONS

More terms from Jon E. Schoenfield, May 16 2010

STATUS

approved

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Last modified January 19 00:03 EST 2021. Contains 340262 sequences. (Running on oeis4.)