Number of (n+1)X4 0..2 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.
A184075
Number of (n+1)X4 0..2 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) =150a(1) =239a(2) =1436a(3) =5760a(4) =25954a(5) =104404a(6) =422992a(7) =1588555a(8) =5471235a(9) =17366119a(10) =50883759a(11) =138309491a(12) =350886736a(13) =834954298a(14) =1873682709a(15) =3985258309a(16) =8070671272a(17) =15625241986a(18) =29027866689a(19) =51922380121a(20) =89705278727a(21) =150134603779
External references
- oeis: A184075