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; };
A061395(n) = if(1==n, 0, primepi(vecmax(factor(n)[, 1])));
Aux324197(n) = if(isprime(n), -(n%2)-1, A324195(n));
v324197 = rgs_transform(vector(up_to, n, Aux324197(n)));
A324197(n) = v324197[n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Feb 20 2019
STATUS
approved