Number of nX4 binary arrays with row sums nondecreasing and columns lexicographically nondecreasing.
A267241
Number of nX4 binary arrays with row sums nondecreasing and columns lexicographically nondecreasing.
Terms
- a(0) =5a(1) =22a(2) =105a(3) =567a(4) =3351a(5) =20676a(6) =129129a(7) =804817a(8) =4982759a(9) =30629206a(10) =187121865a(11) =1137631979a(12) =6891047527a(13) =41628865000a(14) =250987078681
External references
- oeis: A267241