a(n) is the number of fixed polyglasses (polyiamonds which need only touch at corners) with n cells.

A319324

a(n) is the number of fixed polyglasses (polyiamonds which need only touch at corners) with n cells.

Terms

    a(0) =2a(1) =12a(2) =88a(3) =710a(4) =6054a(5) =53500a(6) =484784a(7) =4475010a(8) =41902626a(9) =396838992a(10) =3793117200a(11) =36534684066

External references