OFFSET
1,2
REFERENCES
I. Niven, H. S. Zuckerman & H. L. Montgomery, An Introduction to the Theory of Numbers, 5th Ed., p. 102, John Wiley, NY, 1991.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
MAPLE
with(numtheory): for p from 1 to 100 do printf(`%d, `, (ithprime(p)-1)*phi(ithprime(p)-1)) od: # James A. Sellers, Apr 10 2005
MATHEMATICA
Table[(Prime[n] - 1) EulerPhi[(Prime[n] - 1)], {n, 50}] (* Vincenzo Librandi, Aug 18 2017 *)
PROG
(Magma) [(NthPrime(n)-1)*EulerPhi((NthPrime(n)-1)): n in [1..50]]; // Vincenzo Librandi, Aug 18 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, Mar 31 2005
EXTENSIONS
More terms from James A. Sellers, Apr 10 2005
STATUS
approved