OFFSET
1,2
LINKS
Ivan Neretin, Table of n, a(n) for n = 1..1000
MATHEMATICA
a = {1, 3}; used = {a[[1]]*a[[2]] - 1}; Do[k = a[[-1]] + 1; While[MemberQ[used, k], k++]; used = Union[used, k*a - 1]; AppendTo[a, k], {n, 3, 60}]; a (* Ivan Neretin, Mar 06 2016 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved