OFFSET
0,4
COMMENTS
Restricted growth sequence transform of A366797.
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; };
A001227(n) = numdiv(n>>valuation(n, 2));
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));
v366798 = rgs_transform(vector(1+up_to, n, A366797(n-1)));
A366798(n) = v366798[1+n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Oct 27 2023
STATUS
approved