49036

Appears in sequences

• 1/5 the number of nX3 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=3A185819
• 1/5 the number of nX4 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=2A185820
• T(n,k)=1/5 the number of nXk 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=17A185825
• T(n,k)=1/5 the number of nXk 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=18A185825
• a(n) = Sum_{d|n} d^n * binomial(d+n/d-2, d-1).at n=5A338661
• Records in A390108.at n=14A390454