221994

Appears in sequences

• Number of n-digit base-3 deletable primes.at n=20A096236
• Number of (n+1) X (2+1) 0..2 arrays with the maximum of every 2 X 2 subblock equal.at n=2A237029
• Number of (n+1)X(3+1) 0..2 arrays with the maximum of every 2X2 subblock equal.at n=1A237030
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum of every 2X2 subblock equal.at n=7A237035
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum of every 2X2 subblock equal.at n=8A237035