Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo 4.

A221317

Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo 4.

Terms

    a(0) =1a(1) =2a(2) =7a(3) =14a(4) =28a(5) =66a(6) =168a(7) =378a(8) =866a(9) =2128a(10) =5065a(11) =12000a(12) =28866a(13) =69652a(14) =167994a(15) =405058a(16) =981305a(17) =2381232a(18) =5776411a(19) =14040684a(20) =34175851a(21) =83246764a(22) =202960219a(23) =495273680a(24) =1209625253a(25) =2956269734a(26) =7229756488a(27) =17692733704a(28) =43322486571a(29) =106136686984

External references