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A065585
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Smallest prime beginning with exactly n 2's.
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4
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3, 2, 223, 2221, 22229, 2222203, 22222253, 22222223, 222222227, 22222222273, 22222222223, 2222222222243, 22222222222201, 22222222222229, 222222222222227, 222222222222222043, 222222222222222281
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Maximilian Hasler, Table of n, a(n) for n = 1..201
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MATHEMATICA
| Do[a = Table[2, {n}]; k = 0; While[b = FromDigits[ Join[a, IntegerDigits[k] ]]; First[ IntegerDigits[k]] == 2 || !PrimeQ[b], k++ ]; Print[b], {n, 1, 17} ]
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CROSSREFS
| Cf. A037057, A065584 - A065592.
Sequence in context: A152017 A076931 A076932 * A139737 A036113 A199261
Adjacent sequences: A065582 A065583 A065584 * A065586 A065587 A065588
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KEYWORD
| nonn,base
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 28 2001
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EXTENSIONS
| Corrected by Don Reble, Jan 17 2007
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