

A217698


Primes of the form ((2^p 1)*(3^p 2))2, where p is prime.


0




OFFSET

1,1


COMMENTS

Next two primes have 99 digits and 3,270 digits.


REFERENCES

Tom M. Apostol, Introduction to Analytic Number Theory, Springer, 2010, pp. 412.
G. H. Hardy and E. M. Wright, An Introduction to the Theory of Numbers, Oxford University Press, Sixth Ed. 2008, p. 19.


LINKS

Table of n, a(n) for n=1..3.


EXAMPLE

The primes are generated by p = 2, 3, 7, 127, 4201...


MATHEMATICA

f[x_] := ((2^x  1)*(3^x  2))  2; Select[f[Prime[Range[100]]], PrimeQ]


CROSSREFS

Cf. A000225, A000043, A000668, A001348.
Sequence in context: A322878 A060222 A041690 * A172642 A133740 A125382
Adjacent sequences: A217695 A217696 A217697 * A217699 A217700 A217701


KEYWORD

nonn,bref


AUTHOR

Douglas L. Fox, Mar 19 2013


STATUS

approved



