OFFSET
15,1
EXAMPLE
a(15) = 4 because of:
OOO OOO OOO OOO
O O O O O O O O
O OO O OO O OO OO OO
O O OO O OOO O OO O
OOOOO OOOO OOO OOO
CROSSREFS
KEYWORD
nonn,more
AUTHOR
John Mason, Jan 05 2023
STATUS
approved