OFFSET
1,3
LINKS
John Mason, Table of n, a(n) for n = 1..50
FORMULA
EXAMPLE
a(3)=2 because of hexominoes:
OO and O
O OO
O OO
OO O
CROSSREFS
KEYWORD
nonn
AUTHOR
John Mason, Nov 15 2021
EXTENSIONS
Name corrected by John Mason, Feb 01 2022
STATUS
approved