Number of (n+1)X4 0..3 arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.
A184089
Number of (n+1)X4 0..3 arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.
Terms
- a(0) =684a(1) =1146a(2) =9483a(3) =40401a(4) =235003a(5) =1025854a(6) =4969133a(7) =22190358a(8) =100488243a(9) =437074150a(10) =1877449556a(11) =7754457028a(12) =30996990781a(13) =118227838313a(14) =431216031421
External references
- oeis: A184089