Number of 0..2 arrays x(0..n-1) of n elements with each no smaller than the sum of its four previous neighbors modulo 3.

A200463

Number of 0..2 arrays x(0..n-1) of n elements with each no smaller than the sum of its four previous neighbors modulo 3.

Terms

    a(0) =3a(1) =6a(2) =12a(3) =24a(4) =48a(5) =98a(6) =199a(7) =400a(8) =800a(9) =1597a(10) =3188a(11) =6360a(12) =12679a(13) =25273a(14) =50376a(15) =100400a(16) =200077a(17) =398698a(18) =794502a(19) =1583212a(20) =3154828a(21) =6286514a(22) =12526942a(23) =24961994a(24) =49740765a(25) =99116372a(26) =197505241a(27) =393560803a(28) =784232662a(29) =1562708632

External references