Number of distinct values of Sum_{i=0..n} x(i)*binomial(n,i), where the x(i) have values in 0..3.

Terms

a(0) =4a(1) =7a(2) =13a(3) =25a(4) =49a(5) =97a(6) =193a(7) =385a(8) =763a(9) =1501a(10) =3025a(11) =3913a(12) =12061a(13) =13237a(14) =41693a(15) =94877a(16) =192761a(17) =161679a(18) =577335a(19) =566125a(20) =2121717a(21) =6212095a(22) =11652247a(23) =7210273a(24) =27786775a(25) =88613281a(26) =180520835a(27) =381858643a(28) =791151441a(29) =387619015