Number of nX4 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.
A278672
Number of nX4 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.
Terms
- a(0) =10a(1) =99a(2) =579a(3) =2650a(4) =10584a(5) =38848a(6) =134265a(7) =441349a(8) =1384443a(9) =4148373a(10) =11882640a(11) =32576006a(12) =85619948a(13) =216195769a(14) =525654868a(15) =1233512143a(16) =2800037121a(17) =6161774705a(18) =13172137674a(19) =27405600826a(20) =55592487870a(21) =110125213825a(22) =213350721015
External references
- oeis: A278672