Number of (n+1)X(7+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
A253748
Number of (n+1)X(7+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
Terms
- a(0) =315576a(1) =298760a(2) =2363797a(3) =7348144a(4) =33767784a(5) =106040628a(6) =333213583a(7) =871426149a(8) =2111246736a(9) =4561812863a(10) =9330585017a(11) =17842432139a(12) =32535281473a(13) =56464375423a(14) =94767234632a(15) =153713251358a(16) =242566893076a(17) =372616947142a(18) =560429992326
External references
- oeis: A253748