Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302410
Number of nX3 0..1 arrays with every element equal to 0, 1, 2 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =17a(2) =30a(3) =120a(4) =441a(5) =1431a(6) =4754a(7) =16423a(8) =55848a(9) =188797a(10) =641401a(11) =2181141a(12) =7403533a(13) =25137442a(14) =85383840a(15) =289971604a(16) =984703839a(17) =3344148948a(18) =11357024856a(19) =38568809117a(20) =130981523021a(21) =444820935270
External references
- oeis: A302410