OFFSET
1,1
FORMULA
a(n)/n -> 1/2; for n>= 7, a(n) = (1/2)*(n+b(n)) where b(n) is the 12-periodic sequence (17, 20, 15, 18, 7, 16, 11, 20, 27, 30, 25, 14)
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Dec 05 2002
STATUS
approved