

A164064


Prime p2 of the sequence A164063: a^b  c^d = p1 (A164063), where a, b, c, d are primes and a + b + c + d = p2, where p2 is prime and conc(abcd) = p3 (concatenation of a, b, c , d) is also prime (A164065).


2




OFFSET

1,1


LINKS

Table of n, a(n) for n=1..7.


EXAMPLE

2^7  5^3 = 3, 2 + 7 + 5 + 3 = 17, conc (abcd) = 2753; 3^3  2^3 = 19, 3 + 3 + 2 + 3 = 11, conc (abcd) = 3323; 31^3  2^11 = 27743, 31 + 3 + 2 + 11 = 47, conc (abcd) = 313211; 31^3  2^7 = 29663, 31 + 3 + 2 + 7 = 43, conc (abcd) = 31327;


CROSSREFS

Sequence in context: A166524 A106791 A040274 * A279232 A073887 A132955
Adjacent sequences: A164061 A164062 A164063 * A164065 A164066 A164067


KEYWORD

nonn,base


AUTHOR

Oleg Zyakun, Aug 12 2009


STATUS

approved



