Number of 3 X n {0,1}-matrices such that: (a) first and second row have a common 1, (b) second and third row have a common 1.
A140961
Number of 3 X n {0,1}-matrices such that: (a) first and second row have a common 1, (b) second and third row have a common 1.
Terms
- a(0) =1a(1) =17a(2) =205a(3) =2129a(4) =20341a(5) =184457a(6) =1615405a(7) =13808609a(8) =116015461a(9) =962575097a(10) =7913168605a(11) =64610052689a(12) =524855128981
External references
- oeis: A140961