397734

Appears in sequences

• a(n) = [ a(n-1)/a(1) + a(n-1)/a(2) + ... + a(n-1)/a(n-1) ] for n >= 3, with initial terms 1,1.at n=14A022854
• Numbers k such that A109631(k) + A109631(k+1) = A109631(k+2).at n=32A109651
• Half the number of (n+1) X 2 0..3 arrays with every 2 X 2 subblock having exactly one duplicate clockwise edge difference.at n=4A209780
• Half the number of (n+1)X6 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.at n=0A209784
• T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.at n=10A209787
• T(n,k)=Half the number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference.at n=14A209787