

A108510


Primes p such that 3^A000027*(7*p) is a subsequence of A033631.


1




OFFSET

1,1


COMMENTS

There is no further term up to prime(300000000).


LINKS



EXAMPLE

Let n be a natural number and m=3^n*7*90425537;
then sigma(phi(m)) = sigma(3^(n1)*2*6*90425536) = sigma(3^n*2^8*677*2087) = sigma(3^n)*8*90425538 = sigma(3^n)*sigma(7)*sigma(90425537) = sigma(3^n*7*90425537) = sigma(m),
hence m is in A033631 and the prime number 90425537 is a term of this sequence.


CROSSREFS



KEYWORD

more,nonn


AUTHOR



STATUS

approved



