265124

Appears in sequences

• Number of (n+2)X(2+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011.at n=13A260761
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 150", based on the 5-celled von Neumann neighborhood.at n=9A270322