317115
domain: N
Appears in sequences
- Number of (n+2)X3 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.at n=1A186622
- Number of (n+2)X4 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.at n=0A186623
- T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.at n=1A186625
- T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with 3X3 subblock sums nondecreasing rightwards and downwards.at n=2A186625
- a(n) = 3*a(n-1) - 6*a(n-2), with a(0)=0, a(1)=1.at n=15A190960