Number of n element 0..3 arrays with each element the minimum of 5 adjacent elements of a random 0..3 array of n+4 elements.

A217951

Number of n element 0..3 arrays with each element the minimum of 5 adjacent elements of a random 0..3 array of n+4 elements.

Terms

    a(0) =4a(1) =16a(2) =50a(3) =130a(4) =296a(5) =610a(6) =1177a(7) =2209a(8) =4202a(9) =8366a(10) =17569a(11) =38251a(12) =84134a(13) =183334a(14) =392284a(15) =824110a(16) =1708779a(17) =3523509a(18) =7276452a(19) =15117730a(20) =31635969a(21) =66571659a(22) =140445543a(23) =296202061a(24) =623355780a(25) =1308333724a(26) =2740013491a(27) =5731815041a(28) =11989696656

External references