Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,2,0,1,4 for x=0,1,2,3,4.
A196584
Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,2,0,1,4 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =7a(2) =20a(3) =65a(4) =203a(5) =648a(6) =2057a(7) =6527a(8) =20740a(9) =65833a(10) =209091a(11) =663912a(12) =2108281a(13) =6694767a(14) =21258988a(15) =67507481a(16) =214367707a(17) =680719048a(18) =2161603009a(19) =6864108879a(20) =21796779780a(21) =69215046289a(22) =219790389515a(23) =697938050920
External references
- oeis: A196584