Number of compositions of n such that the maximal distance between two identical parts equals five.

Terms

a(0) =0a(1) =1a(2) =4a(3) =13a(4) =34a(5) =80a(6) =172a(7) =352a(8) =682a(9) =1277a(10) =2314a(11) =4103a(12) =7112a(13) =12120a(14) =20302a(15) =33582a(16) =54860a(17) =88699a(18) =142036a(19) =225407a(20) =354938a(21) =554698a(22) =861366a(23) =1328654a(24) =2038498a(25) =3108789a(26) =4718194a(27) =7122619a(28) =10705550a(29) =16012298