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 A167631 Emirps A006567 with a sum of digits and a number of digits which are both primes. 0
 113, 157, 179, 199, 311, 337, 359, 733, 739, 751, 937, 953, 971, 991, 10039, 10079, 10091, 10253, 10273, 10321, 10343, 10453, 10457, 10459, 10499, 10613, 10639, 10651, 10781, 10853, 10859, 10891, 10909, 11003, 11083, 11159, 11197, 11243 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Subsequence of A006567 and A028834. - R. J. Mathar, Nov 12 2009 LINKS Table of n, a(n) for n=1..38. EXAMPLE 113 and 311 are distinct primes, and 3 (number of digits) and 5 (1+1+3) are also primes. PROG (PARI) sod(n)=my(s=0); while(n>9, s+=n%10; n\=10); s+n R(n)=my(v=eval(Vec(Str(n))), s=0); forstep(i=#v, 1, -1, s=10*s+v[i]); s isA167631(n)=my(r); isprime(#Str(n)) && isprime(sod(n)) && isprime(n) && isprime(r=R(n)) && n!=r \\ Charles R Greathouse IV, Nov 10 2009 CROSSREFS Sequence in context: A102833 A136078 A230255 * A264778 A142303 A152929 Adjacent sequences: A167628 A167629 A167630 * A167632 A167633 A167634 KEYWORD base,nonn AUTHOR Claudio Meller, Nov 07 2009 EXTENSIONS Edited by Charles R Greathouse IV and R. J. Mathar, Nov 10 2009 STATUS approved

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Last modified August 12 10:56 EDT 2024. Contains 375092 sequences. (Running on oeis4.)