OFFSET
1,1
COMMENTS
EXAMPLE
A123176[n] begin {2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 18, 22, 26, 31, 39, 43, ...}.
Thus
a(1) = 2, a(2) = 3, a(3) = 5, a(4) = 7, a(5) = 11, a(6) = 31, a(7) = 43.
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Alexander Adamchuk, Oct 05 2006
EXTENSIONS
One more term from Max Alekseyev, Feb 06 2010
STATUS
approved