OFFSET
1,1
COMMENTS
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
Douglas J. Shaw, The Pure Numbers Generated by the Collatz Sequence, The Fibonacci Quarterly, Vol. 44, Number 3, August 2006, p. 194.
FORMULA
Pure hailstone (Collatz) numbers that are also prime (i.e. the set A127928), mod 18.
EXAMPLE
a(5) = 7 since A127928(5) = 43 and 43 == 7 mod 18.
CROSSREFS
KEYWORD
nonn
AUTHOR
Gary W. Adamson, Feb 07 2007
EXTENSIONS
More terms from Amiram Eldar, Feb 28 2020
STATUS
approved