OFFSET
0,2
FORMULA
a(n) = A294847(n) - 2.
EXAMPLE
Illustration of initial terms (n = 1..6):
. _ _ _ _
. _ _ _ _ _ _ |_
. _ _ _ _ _ _| _ _ _| |_
. _ _ _ _ |_ _ _ |_ _ _ _ |_ _ |
. _ _ _ _|_ _ _|_ | _ _|_ | | _ _|_ | | |
. _ _ | _ | | _ | | | _ | | | | _ | | | | |
. | | | | | | | | | | | | | | | | | | | | |
.
. 2 4 6 10 12 18
.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Omar E. Pol, Nov 09 2017
STATUS
approved