Number of n-element 0..3 arrays with each element the minimum of 3 adjacent elements of a random 0..3 array of n+2 elements.
A217949
Number of n-element 0..3 arrays with each element the minimum of 3 adjacent elements of a random 0..3 array of n+2 elements.
Terms
- a(0) =4a(1) =16a(2) =50a(3) =130a(4) =310a(5) =736a(6) =1821a(7) =4673a(8) =12107a(9) =31103a(10) =79039a(11) =199819a(12) =505477a(13) =1282309a(14) =3259549a(15) =8288613a(16) =21064316a(17) =53497376a(18) =135833020a(19) =344914900a(20) =875983319a(21) =2224986219a(22) =5651490601a(23) =14354263713a(24) =36457137516a(25) =92593166734a(26) =235168023403
External references
- oeis: A217949