Number of nX4 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302208
Number of nX4 0..1 arrays with every element equal to 0, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =13a(2) =5a(3) =7a(4) =18a(5) =55a(6) =172a(7) =575a(8) =1962a(9) =6756a(10) =23400a(11) =81288a(12) =283089a(13) =987275a(14) =3444621a(15) =12023434a(16) =41982749a(17) =146612525a(18) =512036344a(19) =1788383898a(20) =6246509941a(21) =21818284060a(22) =76209472929a(23) =266195826556a(24) =929812279542
External references
- oeis: A302208