OFFSET
1,2
COMMENTS
Sequence is a permutation of the positive integers.
LINKS
Diana Mecum, Table of n, a(n) for n = 1..500
EXAMPLE
Of the positive integers (6,7,8,...) not occurring among the first 5 terms of the sequence, 8 is the lowest coprime to 6*7/2 = 21. So a(6) = 8. a(6) is not 6 or 7 because gcd(6,21) > 1 and gcd(7,21) > 1.
CROSSREFS
KEYWORD
nonn
AUTHOR
Leroy Quet, Apr 28 2006
EXTENSIONS
More terms from Diana L. Mecum, Jul 15 2007
STATUS
approved