Number of nX6 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A318421

Number of nX6 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =10a(2) =8a(3) =126a(4) =280a(5) =783a(6) =2489a(7) =9381a(8) =35283a(9) =124358a(10) =433497a(11) =1542555a(12) =5562368a(13) =20097597a(14) =72352461a(15) =259359679a(16) =929755795a(17) =3339985609a(18) =12012273545a(19) =43189126852a(20) =155189811798a(21) =557528400977

External references