Number of (n+1) X (4+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
A258550
Number of (n+1) X (4+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
Terms
- a(0) =228a(1) =344a(2) =985a(3) =1891a(4) =3754a(5) =6196a(6) =9688a(7) =14216a(8) =20285a(9) =27687a(10) =36927a(11) =48039a(12) =61576a(13) =77378a(14) =95998a(15) =117518a(16) =142539a(17) =170949a(18) =203349a(19) =239869a(20) =281158a(21) =327152a(22) =378500a(23) =435380a(24) =498489a(25) =567811a(26) =644043a(27) =727411a(28) =818660a(29) =917822
External references
- oeis: A258550