Number of 0..5 arrays x(0..n-1) of n elements with each no smaller than the sum of its two previous neighbors modulo 6.

A207097

Number of 0..5 arrays x(0..n-1) of n elements with each no smaller than the sum of its two previous neighbors modulo 6.

Terms

    a(0) =6a(1) =21a(2) =75a(3) =274a(4) =989a(5) =3579a(6) =12964a(7) =46952a(8) =170076a(9) =616065a(10) =2231527a(11) =8083084a(12) =29278684a(13) =106053662a(14) =384149029a(15) =1391469865a(16) =5040201168a(17) =18256685634a(18) =66129616610a(19) =239535602559a(20) =867649138787

External references