Number of fixed n-celled polyominoes which need only touch at corners.
A006770
Number of fixed n-celled polyominoes which need only touch at corners.
Terms
- a(0) =1a(1) =4a(2) =20a(3) =110a(4) =638a(5) =3832a(6) =23592a(7) =147941a(8) =940982a(9) =6053180a(10) =39299408a(11) =257105146a(12) =1692931066a(13) =11208974860a(14) =74570549714a(15) =498174818986
External references
- oeis: A006770