Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.
A253390
Number of (n+1)X(n+1) 0..1 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.
Terms
- a(0) =16a(1) =102a(2) =174a(3) =346a(4) =666a(5) =1318a(6) =2726a(7) =5396a(8) =11392a(9) =22634a(10) =47926a(11) =95464a(12) =201644a(13) =402272a(14) =846688a(15) =1690724a(16) =3546388a(17) =7086130a(18) =14818262a(19) =29621624a(20) =61778428a(21) =123532896a(22) =257035176a(23) =514085752a(24) =1067445536a(25) =2135305688a(26) =4425565336a(27) =8853923848
External references
- oeis: A253390