Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4.
A196630
Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =10a(4) =26a(5) =65a(6) =161a(7) =403a(8) =1006a(9) =2511a(10) =6270a(11) =15654a(12) =39083a(13) =97579a(14) =243625a(15) =608258a(16) =1518637a(17) =3791578a(18) =9466426a(19) =23634809a(20) =59008985a(21) =147327627a(22) =367832622a(23) =918367047a(24) =2292885358a(25) =5724642758a(26) =14292705299a(27) =35684571667a(28) =89093606033a(29) =222439846274
External references
- oeis: A196630