OFFSET
0,1
COMMENTS
a(k) = 29*2^k-1 for k in A050540. - Robert Israel, Nov 23 2016
LINKS
Robert Israel, Table of n, a(n) for n = 0..250
FORMULA
a(n) = A006530(29*2^n-1). - Robert Israel, Nov 23 2016
EXAMPLE
a(2)=23 because b(1) = 2*28 + 1 = 57 and b(2) = 2*57 + 1 = 115 = 5*23.
MAPLE
with(numtheory): b:=proc(n): if n=0 then 28 else 2*b(n-1)+1 fi: end: a:=proc(n) local bb: bb:=factorset(b(n)): bb[nops(bb)] end: seq(a(n), n=0..38); # Emeric Deutsch, May 14 2006
CROSSREFS
KEYWORD
nonn
AUTHOR
Bill McEachen, Feb 06 2006
EXTENSIONS
More terms from Emeric Deutsch, May 14 2006
STATUS
approved