Number of (n+1)X(2+1) 0..1 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
A235550
Number of (n+1)X(2+1) 0..1 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
Terms
- a(0) =46a(1) =202a(2) =814a(3) =2878a(4) =9320a(5) =27731a(6) =77606a(7) =205571a(8) =522118a(9) =1277701a(10) =3035682a(11) =7026779a(12) =15922886a(13) =35411253a(14) =77537074a(15) =167468443a(16) =357585774a(17) =755895685a(18) =1584418882a(19) =3296648763a(20) =6816697174a(21) =14019547045a(22) =28702737170a(23) =58535302827a(24) =118984571742
External references
- oeis: A235550