OFFSET
0,4
COMMENTS
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..65537
FORMULA
For all n >= 1, a(n) = a(2*n) = a(A000265(n)).
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; };
A000265(n) = (n>>valuation(n, 2));
A046523(n) = { my(f=vecsort(factor(n)[, 2], , 4), p); prod(i=1, #f, (p=nextprime(p+1))^f[i]); }; \\ From A046523
A163511(n) = if(!n, 1, my(p=2, t=1); while(n>1, if(!(n%2), (t*=p), p=nextprime(1+p)); n >>= 1); (t*p));
v365395 = rgs_transform(vector(1+up_to, n, A365395aux(n-1)));
A365395(n) = v365395[1+n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Sep 04 2023
STATUS
approved