OFFSET
1,1
COMMENTS
a(p) = 2p+1, p is a prime. a(2^n) = 3*2^n -1.
a(n) also equals the (n+phi(n))th integer from among those positive integers coprime to n, where phi(n) = A000010(n). a(n) also equals n + (the n-th integer from among those positive integers coprime to n) = n + A069213(n). - Leroy Quet, Apr 12 2007
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..1000
PROG
(Haskell)
a077665 = last . a077664_row -- Reinhard Zumkeller, Aug 03 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Nov 14 2002
EXTENSIONS
More terms from Sascha Kurz, Jan 03 2003
STATUS
approved