OFFSET
1,1
COMMENTS
For a guide to related sequences, see A204892.
EXAMPLE
a(1)=s(2)-s(1)=6-4=2
a(2)=s(3)-s(1)=9-4=5
a(3)=s(3)-s(2)=9-6=3
a(4)=s(4)-s(1)=12-4=8
a(5)=s(4)-s(2)=12-6=6
MATHEMATICA
(See the program at A205153.)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jan 26 2012
STATUS
approved