Number of n X 3 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1s.
A296330
Number of n X 3 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1s.
Terms
- a(0) =5a(1) =19a(2) =64a(3) =230a(4) =816a(5) =2895a(6) =10277a(7) =36480a(8) =129486a(9) =459622a(10) =1631463a(11) =5790997a(12) =20555577a(13) =72963551a(14) =258989554a(15) =919302704a(16) =3263133386a(17) =11582734875a(18) =41113779717a(19) =145936421820a(20) =518012193480
External references
- oeis: A296330