120602

Appears in sequences

• a(0) = 0, a(1) = 1 and for n >= 2, a(n) = floor(2 * sqrt(a(n-2) * a(n-1))).at n=28A093333
• Euler transform of period 5 sequence [ 2, 1, 1, 2, 1, ...].at n=32A205183
• Number of (4+1)X(n+1) 0..1 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=17A253701