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A114245
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Number of Fermat pseudoprimes to base 3 less than 10^n.
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5
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OFFSET
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1,3
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LINKS
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Table of n, a(n) for n=1..10.
Eric Weisstein's World of Mathematics, FermatPseudoprime
Index entries for sequences related to pseudoprimes
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FORMULA
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A005935[a(n)]<10^n; A005935[a(n)+1]>10^n. - R. J. Mathar, Feb 10 2007
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PROG
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(PARI) isFps(n, b)= { if(isprime(n), return(0) ) ; if( (b^(n-1)) % n == 1, return(1), return(0) ) ; } { a=0 ; e=1 ; for(n=1, 10^12, if( n == 10^e, e++ ; print(a) ; ) ; a += isFps(n, 3) ; ) ; } - R. J. Mathar, Feb 10 2007
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CROSSREFS
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Sequence in context: A058751 A034359 A220148 * A220238 A078798 A027043
Adjacent sequences: A114242 A114243 A114244 * A114246 A114247 A114248
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KEYWORD
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nonn,more
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AUTHOR
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Eric W. Weisstein, Nov 18, 2005
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EXTENSIONS
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a(9)-a(10) from W. Bomfim, Mar 02 2012
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STATUS
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approved
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