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

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =3a(5) =3a(6) =5a(7) =5a(8) =9a(9) =7a(10) =17a(11) =14a(12) =28a(13) =25a(14) =49a(15) =42a(16) =87a(17) =75a(18) =150a(19) =132a(20) =266a(21) =226a(22) =466a(23) =399a(24) =810a(25) =704a(26) =1421a(27) =1223a(28) =2488a(29) =2143