OFFSET
1,2
COMMENTS
Numbers k such that A353747(k) = A353747(sigma(k)), or equally that A062401(k) + A350073(k) = A000010(k) + A064989(k).
When A003961(x) is substituted for k, the condition becomes: numbers x such that phi(A003973(x))+A326042(x) = A003972(x)+x, i.e. A353747(A003973(x)) - x = A003972(x).
a(15) > 1442840576, if it exists.
LINKS
PROG
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Antti Karttunen, May 06 2022
STATUS
approved