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Search: id:A068847
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| A068847 |
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Smallest prime with same leading digits as 7^n. |
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+0
3
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| 11, 71, 491, 3433, 24019, 168071, 11764967, 8235431, 576480103, 403536071, 2824752493, 19773267431, 1384128720101, 9688901040727, 6782230728491, 474756150994337, 3323293056960127, 23263051398720713, 162841359791044903
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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a(3)=3433 because this is the smallest prime starting with 7^3=343.
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MAPLE
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for i from 0 to 30 do a := nextprime(7^i*10); b := 1; while(a-7^i*10^b>=10^b) do b := b+1; a := nextprime(7^i*10^b); end do; c[i] := a; end do:q := seq(c[i], i=0..30);
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CROSSREFS
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Cf. A068846.
Sequence in context: A049350 A164559 A123362 this_sequence A139185 A103998 A034196
Adjacent sequences: A068844 A068845 A068846 this_sequence A068848 A068849 A068850
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KEYWORD
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nonn,base
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 10 2002
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EXTENSIONS
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More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 17 2002
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