Number of (n+1) X (7+1) 0..1 arrays with every 2 X 2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
A253230
Number of (n+1) X (7+1) 0..1 arrays with every 2 X 2 subblock diagonal minimum minus antidiagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal maximum nondecreasing vertically.
Terms
- a(0) =6740a(1) =9551a(2) =6231a(3) =8216a(4) =11022a(5) =15363a(6) =22656a(7) =35736a(8) =60273a(9) =107607a(10) =200418a(11) =384066a(12) =749271a(13) =1477473a(14) =2931552a(15) =5837268a(16) =11646141a(17) =23261211a(18) =46488558a(19) =92940342a(20) =185840883a(21) =371638821a(22) =743231436a(23) =1486413288a(24) =2972773497a(25) =5945490303
External references
- oeis: A253230