Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.
A209221
Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.
Terms
- a(0) =15a(1) =225a(2) =240a(3) =504a(4) =900a(5) =1776a(6) =3456a(7) =6300a(8) =12656a(9) =24124a(10) =45276a(11) =88400a(12) =170280a(13) =323760a(14) =618496a(15) =1202400a(16) =2300200a(17) =4360824a(18) =8464860a(19) =16284576a(20) =30897024a(21) =59537156a(22) =115023968a(23) =219164204a(24) =419459908a(25) =811024296a(26) =1553149080a(27) =2962595040
External references
- oeis: A209221