Number of (n+1)X(6+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
A253747
Number of (n+1)X(6+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
Terms
- a(0) =95940a(1) =148134a(2) =1204422a(3) =4249381a(4) =19685575a(5) =64166071a(6) =199063466a(7) =515093745a(8) =1244615026a(9) =2727201405a(10) =5639709716a(11) =10890975382a(12) =20090499351a(13) =35396254577a(14) =60232652786a(15) =98961073673a(16) =158149967837a(17) =246162916176a(18) =374812197446
External references
- oeis: A253747