Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302884
Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =12a(2) =37a(3) =141a(4) =569a(5) =2262a(6) =8968a(7) =35667a(8) =141839a(9) =563967a(10) =2242515a(11) =8917145a(12) =35457932a(13) =140994125a(14) =560646436a(15) =2229344056a(16) =8864721595a(17) =35249512434a(18) =140165500184a(19) =557351464922
External references
- oeis: A302884