Number of integer compositions of n into parts that are alternately unequal and equal.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =4a(5) =7a(6) =8a(7) =13a(8) =17a(9) =25a(10) =30a(11) =44a(12) =58a(13) =77a(14) =98a(15) =142a(16) =176a(17) =245a(18) =311a(19) =426a(20) =548a(21) =758a(22) =952a(23) =1319a(24) =1682a(25) =2308a(26) =2934a(27) =4059a(28) =5132a(29) =7087