274824

Appears in sequences

• Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for square lattice.at n=9A019266
• INVERT transform of A000081 = [1, 1, 1, 2, 4, 9, 20, 48, 115, 286,...].at n=14A051529
• Number of n X 2 0..3 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.at n=9A203840