Number of n X 4 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 3 or 6 neighboring 1s.
A296550
Number of n X 4 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 3 or 6 neighboring 1s.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =7a(5) =10a(6) =17a(7) =28a(8) =43a(9) =66a(10) =105a(11) =168a(12) =264a(13) =413a(14) =651a(15) =1030a(16) =1624a(17) =2555a(18) =4025a(19) =6349a(20) =10010a(21) =15771a(22) =24851a(23) =39173a(24) =61748a(25) =97315a(26) =153366a(27) =241722a(28) =380989a(29) =600470
External references
- oeis: A296550