Number of (n+1) X (2+1) 0..1 arrays with no 2 X 2 subblock having the maximum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
A251311
Number of (n+1) X (2+1) 0..1 arrays with no 2 X 2 subblock having the maximum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
Terms
- a(0) =25a(1) =79a(2) =238a(3) =720a(4) =2199a(5) =6717a(6) =20484a(7) =62464a(8) =190542a(9) =581259a(10) =1773061a(11) =5408458a(12) =16497878a(13) =50325018a(14) =153510819a(15) =468267241a(16) =1428396280a(17) =4357161996a(18) =13291031298a(19) =40542790911a(20) =123671208989a(21) =377245070870
External references
- oeis: A251311