Number of (4+1) X (n+1) 0..2 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
A253752
Number of (4+1) X (n+1) 0..2 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.
Terms
- a(0) =7803a(1) =75959a(2) =382973a(3) =1143174a(4) =2351928a(5) =4249381a(6) =7348144a(7) =11783014a(8) =17227486a(9) =24218260a(10) =33845194a(11) =46241656a(12) =60632621a(13) =78042368a(14) =100341383a(15) =127587830a(16) =158431665a(17) =194599303a(18) =238993938a(19) =291534619a(20) =350130482a(21) =417457176a(22) =497739626
External references
- oeis: A253752