Number of (n+2) X (1+2) 0..1 arrays with no 3 x 3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum.
A258538
Number of (n+2) X (1+2) 0..1 arrays with no 3 x 3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum.
Terms
- a(0) =220a(1) =784a(2) =2520a(3) =8100a(4) =25056a(5) =77284a(6) =234848a(7) =712336a(8) =2148108a(9) =6471936a(10) =19455312a(11) =58461316a(12) =175520864a(13) =526886116a(14) =1581124008a(15) =4744454400a(16) =14234924508a(17) =42708355600a(18) =128130243176a(19) =384402480004
External references
- oeis: A258538