OFFSET
0,1
COMMENTS
The sequence reaches its fixed point at a(55) = 3643749709604450870616156947649219, after which the sequence stays constant, a(55) = a(56) = a(57), etc.
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..56
PROG
(PARI)
A234742(n)=factorback(subst(lift(factor(Mod(1, 2)*Pol(binary(n)))), x, 2))+(n==1)
iterates_of_A234742(start, filename) = {my(n=start, prev=-1, prevprev=-1, i=0); until((n==prevprev), write(filename, i, " ", n); prevprev = prev; prev = n; n = A234742(n); i++)} \\ Computes b-file up to the second occurrence of the fixed point.
iterates_of_A234742(23, "b244323.txt")
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen and M. F. Hasler, Jul 23 2014
STATUS
approved