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A105107 Numbers n such that 10000n + 1001 is prime. 2
2, 5, 6, 8, 12, 18, 23, 36, 38, 41, 48, 50, 51, 54, 57, 68, 69, 71, 74, 75, 80, 86, 87, 89, 92, 95, 101, 102, 116, 120, 123, 129, 131, 137, 144, 146, 149, 155, 159, 183, 186, 204, 215, 216, 219, 225, 227, 228, 239, 246, 249, 251, 254, 257, 261, 269, 278, 282 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

a(n) ~ 0.4n log n.

EXAMPLE

n=2: 21001 is prime.

n=69: 691001 is prime.

PROG

(MAGMA) [ n: n in [1..300] | IsPrime(Seqint([1, 0, 0, 1] cat Intseq(n))) ];

CROSSREFS

Sequence in context: A058591 A059009 A026179 * A002253 A032716 A132229

Adjacent sequences:  A105104 A105105 A105106 * A105108 A105109 A105110

KEYWORD

nonn,easy

AUTHOR

Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Apr 07 2005

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.