OFFSET
1,4
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..65537
MATHEMATICA
A060681[n_] := n - n/FactorInteger[n][[1, 1]];
b[_] = 1;
a[n_] := a[n] = With[{t = A060681[n]}, b[t]++];
a /@ Range[1, 105] (* Jean-François Alcover, Dec 19 2021 *)
PROG
(PARI)
up_to = 65537;
ordinal_transform(invec) = { my(om = Map(), outvec = vector(length(invec)), pt); for(i=1, length(invec), if(mapisdefined(om, invec[i]), pt = mapget(om, invec[i]), pt = 0); outvec[i] = (1+pt); mapput(om, invec[i], (1+pt))); outvec; };
A060681(n) = if(1==n, 0, (n-(n/vecmin(factor(n)[, 1]))));
v322871 = ordinal_transform(vector(up_to, n, A060681(n)));
A322871(n) = v322871[n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 29 2018
STATUS
approved