156057

Appears in sequences

• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 3X2 zee 1,1 1,2 1,3 2,3 2,4 in any orientation.at n=9A146134
• Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-2.at n=32A211958
• Sequence shifts left nine places under Weigh transform with a(n) = signum(n) for n<9.at n=53A316081