OFFSET
1,2
COMMENTS
Permutation of odd numbers. Preserves the prime signature.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..10000
FORMULA
PROG
(PARI) A348746(n) = { my(f=factor(n)); for(k=1, #f~, if(2==f[k, 1], f[k, 1]=3, if(3==f[k, 1], f[k, 1]=5, if(1==(f[k, 1]%4), for(i=1+primepi(f[k, 1]), oo, if(1==(prime(i)%4), f[k, 1]=prime(i); break)))))); factorback(f); };
CROSSREFS
KEYWORD
nonn,mult
AUTHOR
Antti Karttunen, Nov 02 2021
STATUS
approved