312001

Appears in sequences

• Number of (n+1)X3 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.at n=3A204224
• Number of (n+1)X5 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.at n=1A204226
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.at n=11A204230
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards.at n=13A204230
• a(n) = (a(n-1) * a(n-3) - (-1)^n * a(n-2)^2) / a(n-4) with a(0) = 0, a(1) = ... = a(4) = 1.at n=19A247368