OFFSET
0,13
COMMENTS
The sprawl of a polyomino is the number of cells in a polyomino plus the number of cells adjacent to it.
LINKS
Sean A. Irvine, Java program (github)
FORMULA
Antidiagonal sums of A338211.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Sean A. Irvine and Allan C. Wechsler, Oct 17 2020
STATUS
approved