58636

Appears in sequences

• Number of 2n-celled free polyominoes with 1 hole that have the 180-degree rotation symmetry and no others.at n=7A057425
• Number of irreducible polynomials over F_2 of degree at most n.at n=18A062692
• Growth series for Heisenberg group.at n=33A063810
• Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 2,1 3,2 3,3 4,3 5,3 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155381
• Number of (n+2) X (2+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001.at n=10A260538