OFFSET
1,2
COMMENTS
For a guide to related sequences, see A204892.
EXAMPLE
a(1)=s(2)-s(1)=2-1=1
a(2)=s(3)-s(1)=6-1=5
a(3)=s(3)-s(2)=6-2=4
a(4)=s(4)-s(1)=20-1=19
a(5)=s(4)-s(2)=20-2=18
MATHEMATICA
(See the program at A205010.)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jan 22 2012
STATUS
approved