OFFSET
1,2
COMMENTS
Restricted growth sequence transform of A025586, the largest value in '3x+1' trajectory of n.
LINKS
PROG
(PARI)
up_to = 65537;
rgs_transform(invec) = { my(om = Map(), outvec = vector(length(invec)), u=1); for(i=1, length(invec), if(mapisdefined(om, invec[i]), my(pp = mapget(om, invec[i])); outvec[i] = outvec[pp] , mapput(om, invec[i], i); outvec[i] = u; u++ )); outvec; };
v328314 = rgs_transform(vector(up_to, n, A025586(n)));
A328314(n) = v328314[n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 14 2019
STATUS
approved