OFFSET
1,1
COMMENTS
Except for k=3, are there any other numbers k such that k, k+2 and k+4 are all unitary untouchable numbers? There are no such numbers below 10^6.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..101
MATHEMATICA
u = Cases[Import["https://oeis.org/A063948/b063948.txt", "Table"], {_, _}][[;; , 2]]; Select[u, MemberQ[u, # + 2] &]
CROSSREFS
KEYWORD
nonn
AUTHOR
Amiram Eldar, Sep 24 2022
STATUS
approved