OFFSET
1,6
COMMENTS
Ordinal transform of A319626.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..65537
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; };
A064989(n) = {my(f); f = factor(n); if((n>1 && f[1, 1]==2), f[1, 2] = 0); for (i=1, #f~, f[i, 1] = precprime(f[i, 1]-1)); factorback(f)};
v330751 = ordinal_transform(vector(up_to, n, A319626(n)));
A330751(n) = v330751[n];
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Dec 30 2019
STATUS
approved