Number of nX4 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.
A278321
Number of nX4 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.
Terms
- a(0) =1a(1) =94a(2) =1678a(3) =19854a(4) =186987a(5) =1548002a(6) =11947350a(7) =87562135a(8) =605431820a(9) =3905165468a(10) =23355599964a(11) =129475795828a(12) =667503759881
External references
- oeis: A278321