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; };
A003557(n) = { my(f=factor(n)); for(i=1, #f~, f[i, 2] = f[i, 2]-1); factorback(f); };
Aux323237(n) = if(1==n, -1, if(n%2, 0, (1/2)*(2 + ((A003557(n)+A173557(n))^2) - A003557(n) - 3*A173557(n))));
v323237 = rgs_transform(vector(up_to, n, Aux323237(n)));
A323237(n) = v323237[n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 08 2019
STATUS
approved