Number of n element 0..3 arrays with each element the minimum of 7 adjacent elements of a random 0..3 array of n+6 elements.

A217953

Number of n element 0..3 arrays with each element the minimum of 7 adjacent elements of a random 0..3 array of n+6 elements.

Terms

    a(0) =4a(1) =16a(2) =50a(3) =130a(4) =296a(5) =610a(6) =1163a(7) =2083a(8) =3558a(9) =5902a(10) =9734a(11) =16410a(12) =28969a(13) =54049a(14) =105529a(15) =211097a(16) =423650a(17) =840654a(18) =1636964a(19) =3121556a(20) =5839194a(21) =10760322a(22) =19647966a(23) =35780070a(24) =65376302a(25) =120393728a(26) =223926347a(27) =420463887a(28) =795087960a(29) =1508967508

External references