OFFSET
1,2
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..87360
PROG
(PARI)
up_to = 87360;
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; };
A327159(n, orgn=n, xs=Set([])) = if(1==n, 0, if(vecsearch(xs, n), if(n==orgn, length(xs), 0), xs = setunion([n], xs); A327159(A034460(n), orgn, xs)));
v327162 = rgs_transform(vector(up_to, n, Aux327162(n)));
A327162(n) = v327162[n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Aug 28 2019
STATUS
approved