OFFSET
1,2
COMMENTS
For all i, j:
Regarding the scatter plot of this sequence, see also comments in A318310. - Antti Karttunen, Feb 04 2020
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; };
A009194(n) = gcd(n, sigma(n));
A318458(n) = bitand(n, sigma(n)-n);
v324389 = rgs_transform(vector(up_to, n, Aux324389(n)));
A324389(n) = v324389[n];
CROSSREFS
KEYWORD
nonn,look
AUTHOR
Antti Karttunen, Mar 05 2019
STATUS
approved