OFFSET
1,2
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..65537
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; };
A334870(n) = if(issquare(n), sqrtint(n), my(c=core(n), m=n); forprime(p=2, , if(!(c % p), m/=p; break, m*=p)); (m));
A334869aux(n) = if(1==n, 0, A334870(n));
v334869 = rgs_transform(vector(up_to, n, A334869aux(n)));
A334869(n) = v334869[n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jun 08 2020
STATUS
approved