414711897

Appears in sequences

• Number of 2n X 2 0..4 arrays with values 0..4 introduced in row major order and each element equal to exactly one horizontal and vertical neighbor.at n=6A198405
• T(n,k) = Number of 2n X 2k 0..4 arrays with values 0..4 introduced in row major order and each element equal to exactly one horizontal and vertical neighbor.at n=21A198408