Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo 3.

A221316

Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo 3.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =8a(4) =19a(5) =44a(6) =84a(7) =212a(8) =474a(9) =1008a(10) =2438a(11) =5436a(12) =12045a(13) =28174a(14) =63292a(15) =142936a(16) =330285a(17) =748286a(18) =1707460a(19) =3930660a(20) =8968641a(21) =20569786a(22) =47335822a(23) =108517496a(24) =249608726a(25) =574843912a(26) =1322068800a(27) =3046723144a(28) =7024972918a(29) =16192943826

External references