OFFSET
1,2
COMMENTS
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; };
A007947(n) = factorback(factorint(n)[, 1]);
Aux322591(n) = if((n>2)&&isprime(n), 0, A007947(n));
v322591 = rgs_transform(vector(up_to, n, Aux322591(n)));
A322591(n) = v322591[n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 18 2018
STATUS
approved