OFFSET
1,2
COMMENTS
Complement of A230035.
Sequence is finite and contains exactly 156 terms.
Generally for every positive integer k there is only a finite quantity of numbers which can't be represented as a sum of k + 1 relatively prime positive integers such that any k of them are not coprime.
For instance, for k = 3, 570570 is the largest number which cannot be represented.
LINKS
Vladimir Letsko, Table of n, a(n) for n = 1..156 [uploaded as b-file by Georg Fischer, Aug 24 2020]
Vladimir Letsko, Table of n, a(n) for n=1..156 (full sequence, source for b-file)
EXAMPLE
Every positive integer less than 31 is in the sequence because 31 obviously is the least number which can be represented as 2*3 + 2*5 + 3*5, i.e. as a sum of 3 relatively prime positive integers such that every pair of them is not coprime.
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Vladimir Letsko, Dec 20 2013
STATUS
approved