Number of n X 1 arrays of the minimum or maximum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 n X 1 array.
A217995
Number of n X 1 arrays of the minimum or maximum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 n X 1 array.
Terms
- a(0) =3a(1) =9a(2) =25a(3) =81a(4) =241a(5) =719a(6) =2181a(7) =6543a(8) =19623a(9) =58983a(10) =176995a(11) =531045a(12) =1593739a(13) =4781741a(14) =14346105a(15) =43041933a(16) =129130449a(17) =387399819a(18) =1162223437a(19) =3486708387a(20) =10460197183a(21) =31380761819a(22) =94142587347a(23) =282428344593a(24) =847286292987
External references
- oeis: A217995