Y by
Let
be an odd prime number. Let
be the sequence defined as follows:
, and for
,
is the smallest integer greater than
such that in
there are no arithmetic progressions of length
. We say that a positive integer is a ghost if it doesn’t appear in
.
What is the smallest ghost that is not a multiple of
?
Proposed by Guerrero









What is the smallest ghost that is not a multiple of

Proposed by Guerrero
This post has been edited 2 times. Last edited by Justpassingby, Jan 20, 2022, 1:29 AM
Reason: Added proposer
Reason: Added proposer