Number of compositions of n into 5 parts such that no two adjacent parts are equal.

Terms

a(0) =1a(1) =3a(2) =15a(3) =30a(4) =68a(5) =119a(6) =204a(7) =316a(8) =489a(9) =696a(10) =987a(11) =1340a(12) =1801a(13) =2348a(14) =3035a(15) =3833a(16) =4812a(17) =5935a(18) =7273a(19) =8792a(20) =10576a(21) =12576a(22) =14887a(23) =17465a(24) =20401a(25) =23651a(26) =27319a(27) =31349a(28) =35861a(29) =40791