Number of nX4 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300926
Number of nX4 0..1 arrays with every element equal to 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =2a(1) =37a(2) =508a(3) =6638a(4) =87561a(5) =1155263a(6) =15238332a(7) =200997959a(8) =2651226860a(9) =34970515586a(10) =461272055711
External references
- oeis: A300926