Number of (n+1) X (1+1) 0..3 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
A251048
Number of (n+1) X (1+1) 0..3 arrays with no 2 X 2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
Terms
- a(0) =66a(1) =290a(2) =854a(3) =2243a(4) =5449a(5) =12858a(6) =29759a(7) =68506a(8) =157205a(9) =360885a(10) =828728a(11) =1904810a(12) =4380530a(13) =10079260a(14) =23198280a(15) =53404661a(16) =122956951a(17) =283114508a(18) =651911889a(19) =1501161236a(20) =3456777827a(21) =7960112783a(22) =18330262426a(23) =42210375756a(24) =97200890000
External references
- oeis: A251048