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 A151993 Number of Honaker primes (A033548) less than 10^n. 0
 0, 0, 3, 63, 410, 2949, 21622, 175504, 1478015, 12330087, 107585476, 937135794 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS G. L. Honaker, Jr. computed the first six terms. Are there an infinite number of Honaker primes? LINKS Table of n, a(n) for n=1..12. EXAMPLE a(3) = 3 because 131, 263, and 457 are the only Honaker primes less than 10^3. MATHEMATICA nn=6; cnt=0; power10=10; Reap[Do[p=Prime[k]; If[p>power10, Sow[cnt]; power10=10*power10]; If[Total[IntegerDigits[k]] == Total[IntegerDigits[p]], cnt++ ], {k, PrimePi[10^nn]+1}]][[2, 1]] CROSSREFS Cf. A006880 (primes < 10^n). Sequence in context: A123754 A048354 A046181 * A120053 A139293 A370827 Adjacent sequences: A151990 A151991 A151992 * A151994 A151995 A151996 KEYWORD hard,nonn,base AUTHOR T. D. Noe, Sep 14 2009 STATUS approved

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Last modified July 19 16:24 EDT 2024. Contains 374410 sequences. (Running on oeis4.)