Number of (n+1) X (1+1) 0..1 arrays with the sum of each 2 X 2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
A235549
Number of (n+1) X (1+1) 0..1 arrays with the sum of each 2 X 2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
Terms
- a(0) =16a(1) =46a(2) =120a(3) =288a(4) =660a(5) =1456a(6) =3136a(7) =6624a(8) =13808a(9) =28480a(10) =58304a(11) =118656a(12) =240448a(13) =485632a(14) =978432a(15) =1967616a(16) =3951360a(17) =7926784a(18) =15889408a(19) =31832064a(20) =63742976a(21) =127602688a(22) =255377408a(23) =511008768a(24) =1022390272a(25) =2045329408a(26) =4091461632a(27) =8184102912
External references
- oeis: A235549